This SOLVED all my issues :) OAG explained + Setup Guide!
Рет қаралды 22,927
Күн бұрынZWO OAG base: bit.ly/3qTetnY
ZWO Helical Focuser: bit.ly/44u8weT
Or High Point Scientific: bit.ly/3sEf39t
If you use an SCT or have a lot of available backfocus, I highly recommend the excellent Celestron OAG paired with a large-sensor guide camera:
Celestron OAG: bit.ly/44yqc9a
Large sensor guide camera: bit.ly/3P2Ps1s
Off axis guiding doesn't need to be complicated!
Support me on Patreon!: / cuivlazygeek
If you're planning on buying equipment (or anything from Amazon), it will help me if you first click the affiliate links below!
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My equipment
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ZWO Seestar S50: tinyurl.com/3n62hpzx
Cooled camera: s.click.aliexpress.com/e/_DCY...
SW Quattro 150P Budget Newt: bit.ly/3BABCxl
Backyard Universe upgrade kit: tinyurl.com/3juwm5sz
OCAL Collimator: s.click.aliexpress.com/e/_Dmu... or s.click.aliexpress.com/e/_Dc6...
Askar V Modular Telescope: bit.ly/3Imoq2M
or bit.ly/3GLuyR8 or tinyurl.com/2h758bvt
ZWO AM5 Mount: bit.ly/3Qb5xVf or bit.ly/3JeVUkn
iOptron CEM70: bit.ly/431Ii2U (successor of my mount)
MiniGuideScope: bit.ly/3MyUJhn
Antlia ALP-T highspeed filter: bit.ly/42RBR2e
Celestron C6: bit.ly/3ocePVs
Hyperstar C6: starizona.com/products/hypers...
Mini Computer (newer version): amzn.to/3LQTgTJ and amzn.to/3K6x2vy
AstroPC Pro: astro-gadget.net/gadgets/astr...
Cable management: www.etsy.com/shop/SmartCompon...
IDAS GNB filter: idas.uno/space/en/IDAS/gnb.htm
Flocking paper/Felt paper: amzn.to/3zASgvu or amzn.to/3m94zwa
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Affiliate Links
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Agena Astro Affiliate Link: bit.ly/3Om0hNG
High Point Scientific affiliate link: bit.ly/3lReu8R
All-Star Telescope: bit.ly/3SCgVbV
Dwarf 2 Smart Telescope: bit.ly/3SyChXu
General Amazon Link:
amzn.to/3hTB5Ne
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My Instagram: / cuivlazygeek
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@CuivTheLazyGeek 11 ай бұрын
Off axis guiding doesn't need to be complicated! If you use an SCT or have a lot of available backfocus, I highly recommend the excellent Celestron OAG paired with a large-sensor guide camera: Celestron OAG: bit.ly/44yqc9a Large sensor guide camera: bit.ly/3P2Ps1s ZWO OAG base: bit.ly/3qTetnY ZWO Helical Focuser: bit.ly/44u8weT Or High Point Scientific: bit.ly/3sEf39t Support me on Patreon!: www.patreon.com/cuivlazygeek If you're planning on buying equipment (or anything from Amazon), it will help me if you first click the affiliate links in the description!
@luboinchina3013 11 ай бұрын
Saturn in opposition and Jupiter in opposition soon. Any chance of planet capturing comparing different camera manufacturers? Asiair planet capturing and stacking? Also heard about a comet filter. Do they work?
@michael.a.covington 11 ай бұрын
The moon is very handy -- it gives you correct infinity focus (for the stars) and is easy to set up an OAG with.
@CuivTheLazyGeek 11 ай бұрын
That works too :D
@gabrielnicolaechiru5050 2 ай бұрын
Your video answered to all of my questions regarding OAG. Great job and thank you very much! 🙏🏼
@Jcorban08 11 ай бұрын
Happy to hear the OAG solved the problem! That’s great news! Every time I watch one of your videos I learn something new. I never dreamed of checking the imaging sensor position relative to the OAG prism. Will do that! Thanks, Cuiv!
@deep_space_dave 11 ай бұрын
Hi Cuiv! I'm glad you figured this out as guiding issues can be quite annoying! I was looking at Askar's OAG and it looks pretty good as well! Hope the typhoon will pass soon but you sound is pretty good considering all the wind! Thanks and clear skies🌅
@The_Vinceable 11 ай бұрын
So thankful for your channel @CuivTheLazyGeek I like full moon sessions too. We always seem to get clear calm nights then too. Nice to be able to use that time to experiment and learn.
@MrASquirrell 11 ай бұрын
Your explanations are always so detailed and easy to follow and fascinating even though this is way more advanced than my star adventurer and recently acquired Vespera. Thank you!
@CuivTheLazyGeek 11 ай бұрын
Glad you like them!
@ricklaird2218 5 ай бұрын
Excellent video. I look forward to adding an OAG to my setup
@rkumardk1 11 ай бұрын
Thanks so much Cuiv...very informative video as always... I have the OAG sitting in the box for some time now.... Your video explains all the intricacies involved with properly setting up this device.....
@CuivTheLazyGeek 11 ай бұрын
Glad you found it helpful and good luck setting it up!
@OVSoftLLC 7 ай бұрын
Another one very useful video from this channel. Thanks a lot!
@felizflyer 6 ай бұрын
Great explanation as always. I just received my ZWO OAG that I'm now attaching to my Quattro 150p following your directions
@CuivTheLazyGeek 6 ай бұрын
Have fun!
@petesastrophotography 11 ай бұрын
Excellent video once again Cuiv. I switched to OAG's a while back even on my wide field rigs. The combination of filter wheel, OAG and camera gives the required 55mm backfocus like you say (I also have a 0.6mm spacer to account for filter thickness). I also like the fact the OAG makes the whole setup more compact compared to having a separate guide scope.
@LogansAstro 11 ай бұрын
Glad to here the use of the OAG sorted out the guiding issues. They can be a bit of trouble to get setup initally but once working, they are great, especially for long focal lengths. I am using OAG's for my two bigger rigs, the Meade 10" SCT and my SkyWatcher Esprit 120 (probably not necessary for the Esprit but guiding is great and I can get up to 20min exposures on both rigs). I used to use the the smaller OAG from ZWO (looks like the one you have) but I found it was too easy to slightly push the camera off center because the OAG uses those three screws for attaching into the imaging train and it's not that easy to get them exactly even and therefore exactly straight. In the end I swapped it out for the OAG-L (now using them on both rigs) as I could bolt them to the filter wheels on the "camera" side and on the telescope side it's a screw together connector so I know everything is as straight as possible.
@GuitarKid581 11 ай бұрын
I'm so glad to see more experienced astrophotographers loving the 150P. I bought it last year (after SO MUCH research and back and forth) as my very first imaging scope and it's been performing amazing for me. It's nice to know my decision was sound and it's even better having people like you to now show me what I can do to make this little scope even better!
@CuivTheLazyGeek 11 ай бұрын
Always good to meet fellow 150Pers :D
@noahhaverkamp 2 ай бұрын
Okay I'm sold on the OAG, thanks!
@skesinis 11 ай бұрын
Thank you for that explanation Cuiv! My rig is an old Alt-Az Celestron NexStar 127SLT (1500mm, 5 inch Cassegrain), which doesn’t have an ST4 compatible port for guiding, but it has something in common with your rig, which lead me realise what was happening to yours. It’s the longer focal length than previously used small rigs. The greater it is, the more everything will need to be accurate in your rig. Every single thing that deviates, will be greatly exaggerated when the focal length increases. I’m using mine mostly for planetary imaging, and to do so, I was also using a 5x TeleVue PowerMate. This would increase the focal length to the extremes for the lousy mount that I have, which by the way doesn’t even have a clutch to balance it, so I’ve been doing the balancing off mount before mounting the scope to it, and marking approximately how far I should move the dovetai. Anyway, when I was trying to focus manually, this absurd focal length, would make it impossible, because I also had the image at 10x on the back of my Canon DSLR, and a planet would disappear from view even with the slightest touch. I’ve since made a DIY focuser with a tiny stepper motor and an Arduino driving it, and I’ve resolved that, but what you were dealing with, brought back in memory all those issues I had to overcome, to (partially) fix the ones my rig had.
@trollshark6260 11 ай бұрын
Man, you always post videos at the perfect time because I was looking at OAGs about 2 hours ago 😂
@CuivTheLazyGeek 11 ай бұрын
Hahaha well now you have some more details - hope you get an OAG that works for you!
@ricklaird2218 7 ай бұрын
A fantastic video again. Thank you. I am going to move to an OAG. Thanks
@GlennMartinPhotography 11 ай бұрын
Such a great breakdown, Cuiv!
@CuivTheLazyGeek 11 ай бұрын
Thank you!
@markabbott6223 4 ай бұрын
I’m graduating from a 90mm refractor with guide scope to a 200mm f4 Newtonian and just purchased a ZWO OAG. Going to try to put it together before the weekend when the moon is almost full. Thanks for the tutorial and sharing your experience. Wish me luck!
@darkrangersinc 11 ай бұрын
Great review and overview of OAG! Been thinking about swapping myself not because of issues but just to keep things more compact and simple 👍🏼
@CuivTheLazyGeek 11 ай бұрын
It sure helps keep things compact, and another advantage is it can make guiding more accurate since it shares the focal length with the main scope :)
@carvrodrigo 11 ай бұрын
Take a look at askar OAG it is so much more robust and well made! Another thing is that Askar prism is 10x10 and zwo is 8x8. I have both and my guide precision sky rocket. Be sure you have low-bortle skies or a modern high QE mono cam. Saw a lot of folks having problems with a lack of guide stars due to low light even with 3s phd intervals.
@perry3928 11 ай бұрын
Thanks Cuiv. Considering a guide scope, but this looks promising
@stargaizerss 11 ай бұрын
I just started using OAG with my new FRA600. I am getting the best guiding I have ever had. Where I was getting 50 t0 100 RMS. I am now getting 20 to 50 RMS. I wish I had not let my worries get the best of me and prevent me from using OAG.
@CuivTheLazyGeek 11 ай бұрын
I often see that with OAGs as well!
@stargaizerss 11 ай бұрын
@@CuivTheLazyGeek As for focus. I'm using an asi120mm mini. I took the black extension off and I was able to get focus. I'm using the Askar OAG with the helical focuser.
@lavers_1 11 ай бұрын
This is very well explained as always. Great channel! thx
@CuivTheLazyGeek 11 ай бұрын
Glad you think so! Thanks!
@damiengalanaud3817 11 ай бұрын
Nice video Cuiv. If you want to improve further the flexture problem, you should consider replacing the TC40 carbon fiber tripod by a sturdier one. While it’s light and very portable it shows its limitations for heavier payloads such as the one you are using. Berlebach (from Germany) makes very nice ash wood ones, with an option to have it fitted with an AM5 compatible plate. I made the switch a few months ago and it considerably improved the guiding with my C8 and my TS photon 150 mm. In addition, it makes working on the telescope much more confortable. They are not very expansive, and if you can get them in Japan it is a no brainer investment.
@amp2amp800 11 ай бұрын
You made it look easy Cuiv! I had similar fun with co-focus with the flip mirror on my planet setup (always easier to acquire and center a planet with help of a widefield crosshair eyepiece). In that configuration I need to do PA and goto with the (innaccurately aligned) guidescope because the planet camera field of view is much too small behind the barlow.
@lostmypicks 3 ай бұрын
Thats where I'm at. In 5th grade i bought my first telescope. A 4.5 inch orion short tube on an non mortorized eq mount. I never learned how to even polar align. I always star gazed but fell away from the hobby a bit. Ive had my seestar now ( which looking for videos helped me find your channel) i love it so much and I'm hooked again. Now I'm already putting together a shopping list of astrophotography parts. I want more clearity. More power. Control of what field of view i can have. And sharp sharp details. I'm thinking since I'm new i will probably get locked into the zwo-verse. But watching your videos and seeing you over come and learn things and sharing your knowledge is a god send. Lol anyway thays my pointless story. But i think this is many of us. Keep up the content :)
@CuivTheLazyGeek 3 ай бұрын
I'm so glad you shared your (not pointless!) story, it's this kind of feedback that keeps me going with the channel :)
@lostmypicks 3 ай бұрын
@CuivTheLazyGeek thank you man. This is why community is great. Your passion helps us pursue ours and our positive feedback can help you. I watch my friend start a KZfaq page. He has since stopped it because editing videos was just too much. So I understand it's not easy to stay at it sometimes. But trust me we all hope you will. Clear skies brother.
@tostativerdk 11 ай бұрын
Thanks for a great video and demystifying OAG for me 😊
@CuivTheLazyGeek 11 ай бұрын
You are so welcome!
@user-lt9py2pu6u 11 ай бұрын
Always look foreword to your videos, entertaining and informative. I was considering a new guide scope so I don't have to change the ones I have over from one main scope to another but might fit one with an OAG instead now. Also, as autumn aproaches its one less lens exposed directly to the dew ladened air to worry about. ( had a lot of trouble with this last year, even with dew heating on the guide scope)
@CuivTheLazyGeek 11 ай бұрын
Glad this is helpful, and thank you for your support!
@1dgram 10 ай бұрын
With many focal reducers, especially those that act as a field flattener you'll have specific backfocus requirements you'll want to adhere to so that the stars in the corners don't appear stretched. When you add the OAG to the imaging train you'll have to reduce the distance after the reducer by an equal amount to that added by the OAG.
@GTFreeFlyer 11 ай бұрын
Was just about to order a couple hundred bucks of stuff... then no! Cleared out my cart, came back here, and clicked the affiliate link first :) Thanks for the vids! Cheers from SoCal.
@CuivTheLazyGeek 11 ай бұрын
Oh wow, thank you so much! This is always super helpful, thanks for thinking of me!
@Brians_Astro-Adventures 11 ай бұрын
Great video thanks 🔭
@CuivTheLazyGeek 11 ай бұрын
Any time!
@TobeGH3 11 ай бұрын
What a coincidence. I just had the exactly same issue. Since I usually only expose for 150-180s at a time, I never noticed it, but when I got the DuoNarrowband, I wanted to push for 5-10 Minute exposures. And I also had completely unusable images, despite very good tracking. I am using a 8" Newtonian telescope with a 180mm guidescope. People told me it has to be flexure, so I bought a new dovetail, which allowed me to actually screw it on the telescope rings. But even then, I still had the same issue. A lot of testing and eliminating other issues later, I was just hit with frustration. I then bought an OAG as a last resort, which sadly doesn't allow me to use a manual rotator anymore due to distance issues, but still I would never want to miss it anymore. Sure, it was a little finicky to set up, but the first image I took filled me with pure joy. A 15 minute exposure, with actually quite bad guiding (prob due to bad seeing) in comparison, and still I had perfect stars. Would never want to miss it again!
@CuivTheLazyGeek 11 ай бұрын
Right!! I'm so glad you could fix that frustrating issue! Apparently the OTA tube itself can bend!
@jensleuteritz6827 11 ай бұрын
Hehe, actually the first video of you I have learned nothing in, since I recently installed an OAG and read through everything that I could get. But as always the video was fun to watch and well made. Great you are back with us Newtonians 😅 clear skies!
@CuivTheLazyGeek 11 ай бұрын
Hahaha well done on your own research and installation!
@paths1111 11 ай бұрын
Thanks for the video! Note that you can remove the M42 spacer ring on the OAG base, this might get you close enough to focus. Also you probably know this, but raising/lowering the prism stalk assembly doesn't change the distance from the prism to the guide camera, so it won't affect guiding focus. For the backfocus distance, do remember to add roughly 1/2 of the thickness of the filter to the spec distance - my Chromas are 3mm thick, that would increase the actual physical spacing to 56.5mm or so. Might not matter at f/4, can make a difference on very fast optics (f/2 - 3 ish). OAGs are essential for many scopes, especially SCTs where mirror wobble as the scope tracks can result in differential flexure with guide scopes, especially over the 15-30 minute exposures that I typically take for narrowband. I don't know if mirror wobble would occur with your Newt, or if flexure from the focuser drawtube might have caused your issues, as the gravity vector changes as the scope tracks. Flex in the spider assembly also can cause issues with some Newts, especially if the secondary assembly is heavy or the spider vanes are not adequately tensioned, or insufficiently robust.
@CuivTheLazyGeek 11 ай бұрын
Thanks for all these additional information! And yes I have a whole video (from 2020) about the impact of filters on back focus, demonstrated mathematically haha
@NckBrktt 11 ай бұрын
Cuiv. The black ring at the bottom of the helical focuser is a 10mm T2 spacer. You can remove it (or add a thinner one) to make the focuser shorter (or longer with a thicker one). The ring is very tightly screwed on but can be taken off. I had the same problem until I realised this.
@CuivTheLazyGeek 11 ай бұрын
Thanks for the tip!! I'll try
@rbrickproductions123 11 ай бұрын
I switched to an OAG, i honestly haven’t noticed a significant performance improvement but my mount is rather inexpensive & has a lot of backlash. That said i think it has improved my RMS, and in general i enjoy it over a guide scope because it’s lighter & I’m able to use my guide scope shoe as a spot for my pegasus astro power box! I think I’ll go with OAGs when i can from now on honestly.
@astrofromhome 11 ай бұрын
My first usage of the ZWO OAG still needs to happen. I have tried to set it up the same way you have shown pointing my scope at something distant to focus the imaging camera first and then the guiding camera. Unfortunately to find something in a sub-urban area that is distant enough to get good focus with 1600mm focal length can be quite challenging. 😄 So I did the pre-setup with a ruler and a calculator. From the maths I am within 1mm range that both cams differ in terms of back focus. I hope that's good enough to quickly get focus for the guide camera once there will be a clear night again. I am waiting for 2.5 months now to get clear skies again. BTW: I am going to send you a photo of my 3d printed dew shield for my Skywatcher 150 PDS that does not require any additional material to mount it within the next days.👍
@antonsinitsyn6420 11 ай бұрын
That's great! I was just deciding whether to purchase OAG or not, and then I found your video, mate. Thank you!
@CuivTheLazyGeek 11 ай бұрын
Good luck setting yours up!
@ssrattus 11 ай бұрын
Thanks Cuiv!
@CuivTheLazyGeek 11 ай бұрын
My pleasure!
@BiscuitAdvisory 11 ай бұрын
youre reading my mind! i was just thinking about getting an OAG
@CuivTheLazyGeek 11 ай бұрын
Woohoo! Hope this helps you setting it up!
@Florian-dx1xm 11 ай бұрын
Hi Cuiv ! First comment here (and almost first on YT), so first I'd like to thank you for all your content in which I've digged into for 2 years now, while going deeper and deeper down the rabbit hole :) About OAGs : I was thinking of getting one for my wide field setup (Askar FMA 180mm + PO imx533 camera + SA GTI). Guide scope works well but it is almost as big as the main scope, which looks a bit stupid :). Seriously, the idea would be to make the whole setup as much compact, balanced and lightweight as possible. In the other hand i fear the guiding is getting worse (the scope is supposed to be corrected for FF sensors though). Would you recommend using one for such purpose with such a short FL ?
@anata5127 11 ай бұрын
So, your best system was Vixen. You are like magnet trying to move in this direction. I glad you came to conclusion that CEM60, fastar, non-edge SCt are good, but “good” is not good enough.
@Dennis-tf2cs 11 ай бұрын
I started with an OAG in 1983👍👍, never looked back, will never use a guide scope. The OAG is just so much more accurate.
@kennetknudsen7042 11 ай бұрын
had that guide scope you showed at start. though gear lottery had mine with imperfection in the glass elements impairing guiding . and it tended to flex a bit so i 3d printed a clamp to clamp it into a finder shoe to avoid flexing.
@CuivTheLazyGeek 11 ай бұрын
Glad that worked for you!
@edjones3390 11 ай бұрын
Had some trouble getting my OAG setup on my RC-8 - watching your KZfaq suggests my camera may not have been orientated correctly! Hoping to try again next time its clear - Thanks!
@CuivTheLazyGeek 11 ай бұрын
Good luck!!
@Hilmi12 11 ай бұрын
The entire OTA for budget newtonian telescope will flex, also primary mirror cell will cause some movement
@CuivTheLazyGeek 11 ай бұрын
That's another potential cause I no longer have to worry about :D thanks!
@JamesBossert 11 ай бұрын
@CuivTheLazyGeek 11 ай бұрын
You're welcome!!
@TheTabugman 5 ай бұрын
Thanks Cuiv. Looking into going this route, but I'm afraid that I won't be able to put the OAG in front of my EFW. The reason is that my Altair Ha/Oiii and Sii/Oiii 4 nm filters reaches focus very similarly, while my Antlia Quadband filter always requires a fairly robust refocus. I guess that means I'd need to put the OAG closest to the camera, severely dimming the starlight for my Asi 290mm guide camera... 😢
@CuivTheLazyGeek 5 ай бұрын
I'd still recommend to have the OAG in front of the EFW... You'll just need to refocus it slightly when using the Antlia Quadband..
@derekbaker3279 11 ай бұрын
Fantastic video Cuiv! In addition to being an accomplished astrophotographer & genuinely nice guy, you are an excellent teacher!👍👍BTW, with the addition of the off-axis guider, what is the total cost of all the modifications you have made to ensure that your 150P Newt is a reliable, high-quality image system?🤔p.s. I hope the typhoon does not affect you too much!🙏
@CuivTheLazyGeek 11 ай бұрын
Total cost of the 150P with the improvements (spider, mask, OCAL, OAG) would be around 900-1000 USD, still a pretty good price!
@MrEdayn 11 ай бұрын
Thanks for the great video Cuiv ! About focusing : everytime you change the filter, your EAF would run a new autofocus, therefore changing the focus of your complete imaging train, including the guide camera. Do you manually refocus your guide camera after each filter change ?
@ShevillMathers 11 ай бұрын
The flexure is taking place at the main camera, look at the length of the imaging train with the heavy camera acting like a pendulum-as the telescope changes position during exposure-there is a minute flexure taking place relative to the telescope tube/optics. Using an off-axis guider eliminates this error because the guiding camera moves at the flexure. I found this out years ago when designing my square tube 12” Newtonian’s. I designed a sliding focuser/diagonal assembly which moved as the main focus keeping the camera etc as close to the scope ‘tube’ as possible, with fine minute focus tweak using the focuser. Result =perfect stars, better images being able to use a much smaller diagonal because my camera is very close to the square ‘tube’ rather than projecting an image all the way out to the camera as in your rig. My construction technique also uses a very shallow focuser, thus reducing the stick out etc. Greetings from Tasmania Australia 👍😁🇦🇺🦘
@CuivTheLazyGeek 11 ай бұрын
Yep, as I mentioned in a previous video, that was my suspicion as well - but others who own the same scope also suggested it was likely the tube itself was also flexing!
@Neanderthal75 11 ай бұрын
An OAG can be more expensive, than just the OAG. I have the same OAG what you have sitting in a box for over a year now. I tried it 3 times but there was a lack of stars, due to the zwo120mini guider cam is too small sensor. Important to have a guide camera with a larger sensor. I still have yet to purchase a larger sensor guider, because I got 3 of them - but they are all small sensors and I tried all 3 and only see 1 or 2 stars through the 1300mm RC and horribly out of shape. I guess I'm just reluctant to buy a larger sensor guider for $300-400 or a larger OAG.
@aj-astrophoto 11 ай бұрын
Thank you for your very interesting video (as always for your videos) I have a question the C6 has a focal length of 1500, can you capture stars with the OAG, I heard that with such a focal length it was not possible to use an OAG?
@derekderek2570 11 ай бұрын
Cuiv!!! How’s the back feeling these days?
@johndaley9188 9 ай бұрын
I'm in research mode and have thought about an OAG as a good to get item. First time seeing the fine adjustment capability for the guide camera. Too bad it didn't work for your configuration.
@CuivTheLazyGeek 9 ай бұрын
I've ended up making it work - and there's also a new Touptek OAG that should be pretty nice!
@marcomanenti9966 10 ай бұрын
Thanks a lot Cuiv for your video! Just a question: using OAG on long focal tube in a site with air turbolence, the guide camera could have some problems following a star "blurred" or moved by turbolence? Is not better a lower focal ratio for guiding? Marco
@gregorykeating4195 5 ай бұрын
Hi Quiv - a quick question as I set up a new AOG. I read that having a filter in the image train adds to the back focus requirement - so a 3mm filter for example, would extend my back focus by 1mm from 146mm to 147mm. I originally thought the filter accounted for 1mm of the back focus requirement, so I've actually been 2mm out of focus. Is my new understanding correct - it's additive? Thanks as always, Greg
@valeryo78 11 ай бұрын
I was wondering if all the weight on the focuser can cause flexure problems in the image train. We have the same "no good" focuser on the Quattro 150P and I'm afraid this can lead to poor FWHM and Eccentricity... could you evaluate this? and, as always, keep up the good work!!!
@feiyangou8375 4 ай бұрын
Hi, I wonder where you buy your newtonian hood? Is that a 3D printed one by yourself or a stock one? Thanks!
@Astrorun 11 ай бұрын
Bonjour Cuiv, Merci pour cette super vidéo. J'aurais une petite question : comme le champ "vu" par la camera de guidage est orienté dans la même direction que le champ du télescope, ne rencontres-tu pas de difficultés à faire la calibration sous phd2 lorsque tu vises une cible proche du pôle céleste ? Utilisant une lunette pour le guidage, il m'est arrivé plusieurs fois que le logiciel refuse la calibration car l'étoile qu'il avait pris en référence ne bougeait pas assez étant donné sa proximité avec le pôle céleste. Cela m'obligeait à orienter la lunette de guidage dans une direction différente pour résoudre le problème. Comment résoudre ce problème avec l'OAG ?
@comeraczy2483 11 ай бұрын
Very nicely made tutorial. Thank you very much! I have some questions regarding your choice of equipment and setting. First why this specific guider instead of an OAG with a much larger prism that would be better suited to the fast guiding required by your mount? Also, why bother with M42/M48 connections when there are options to connect OAG, filter drawer/wheel, and camera with M2.5 screws? Finally, since you have a filter drawer, shouldn't you account for the glass in your back focus distance and have 56mm instead of 55mm?
@CuivTheLazyGeek 11 ай бұрын
- back focus distance, other OAGs tend to be too thick. Also this OAG is cheap! - because this OAG doesn't have the screw options, it's not the OAG-L - yes, and I do, I can't make things too complex in a single video :) And it doesn't change things much at F4 at least for this telescope
@flaviosdereste 4 ай бұрын
Cuiv, can I use a color camera (like ASI462) with OAG? I'am struggling to get a reasonable focus with my OAG and ASI462. The focuser doesn't work too, because I need to bring the sensor closer to the prim. Furthermore, the stars are very dim and often I don't even detect them, affecting the guider.
@darrenwilliams414 11 ай бұрын
i just updated pixinsight ( that was a bad idea) iv'e now lost ez processing suite do you know of a fix or replacement &/or do you have a tutorial that doesn't use ez thanks
@naveenmalik8531 11 ай бұрын
"We're all masochists somehow" lol! Yes, every time I try a new thing I think how great it will be. At least now I know how much pain I should expect. First time focusing a guide camera? Only took 3 hours to figure it out. Focusing on Saturn last night with a C8 and 3x barlow.. only 1 hour. Love the hobby, love trying new techniques and gear. Glad I know now to drink a cup of coffee at sundown and prepare for a long (long) night. Btw, I personally prefer the ZWO OAG-L which I bolt directly to my EFW. It was frustrating with the ZWO OAG to deal with tilt and rotation from the two parts when travelling.
@CuivTheLazyGeek 11 ай бұрын
Yes if I did have the whole ZWO equipment I'd likely have gone with the OAG-L as well!
@robertsipes7391 8 ай бұрын
My camera pushes my Crayford down even when I have my tension completely tightened. Any suggestions on what to do?
@TheCassese 11 ай бұрын
Hi Cuiv, thank tou for the video. One thing that made me stop using OAG was the narrow band filters have focus offsets so if I was in focus on one filter when refocusing when changing filters makes oag out of focus. Any thoughts on that?
@CuivTheLazyGeek 11 ай бұрын
OAG can deal with some small focus changes - so if the filters are more or less parfocal (the same thickness) it shouldn't be a big issue. Were you using different brands?
@derekderek2570 11 ай бұрын
What magical microphone do you use where no wind noise is picked up in this video?
@CuivTheLazyGeek 11 ай бұрын
Derek! I use the AI Voice Isolation in DaVinci Resolve, it's amazing!
@juno1666 7 ай бұрын
Hi Cuiv, Did you end up removing the helical focuser and using the camera position for focusing? I seem to recall that there was an issue with the helical focuser? Or, just my bad memory! Thanks, Jim
@matteozic 11 ай бұрын
Hey Cuiv, nice video! With a Quattro 250p (250mm 1000mm focal) and a ZWO 120mm as guiding camera would you suggest the use of a OAG rather than a guiding scope? My worry is to not be able to find some guiding stars when going after deep-sky objects with such a focal lenght; if so, what guidescope would you suggest? Thanks!
@tommyblomqvistSE 11 ай бұрын
I'm used ZWO OAG on my 150pds with 750FL and found out that the ASI120MMmini doesn"t always find stars. But with a slightly better guide camera like ASI290MMmini i worked like a charm. My point is that the answer to your question maybe depends a bit on what guidecamera you are using.
@SKYST0RY 11 ай бұрын
Would a camera with a square sensor be blocked by the OAG prism?
@CuivTheLazyGeek 11 ай бұрын
It only depends on the size of the OAG and the side of the sensor. The shape doesn't really matter - current square sensor would be the 533, which is relatively small, so not an issue!
@paulwilson8367 6 сағат бұрын
What if I have a big filter wheel? That takes up 20mm of my back focus space? I would need a tiny OAG to make my back focus work!
@fazergazer 11 ай бұрын
An additional source of “flexure” I found was the settling of the primary mirror! OAG fixed issue since I didn’t want to snug the mirror too tight😊
@derekbaker3279 11 ай бұрын
Very true. Mirrors & lenses will always lag behind the changes in ambient temperature, so that alters the figure, quality of star shapes & focal length of the system, all of which will lead to subtle 'flexure' issues during exposures. Also, with the smaller than optimal thickness of primary mirrors that are often used today, the focal length of the mirror can change with changing orientation (which is why properly-designed, well-constructed 9 point or even 18 point primary cells are preferred with reflectors...)
@CuivTheLazyGeek 11 ай бұрын
So many causes! And a single fix haha
@MrGuitar50 9 ай бұрын
Excellent video mate! I have a 2350 mm Celestron SCT but I also use it with a Hyperstar lens which takes the FL down to 517 roughly. I want to be able to guide in both cases. Should I be able to purchase just 1 configuration to do both?
@CuivTheLazyGeek 9 ай бұрын
Hyperstar sits in front of the objective lens, which makes it unsuitable for OAG use - so one scenario would be OAG, the other guidescope
@MrGuitar50 9 ай бұрын
Thanks! Makes sense!
@johndaley9188 6 ай бұрын
When the time comes, OAG is on my list. ZWO vs Celestron? Others have said they like Celestron. Have you had a chance to compare? The helical focuser seems to make sense. Would it work in other configurations? 8" SCT?
@CuivTheLazyGeek 6 ай бұрын
Yes, I've had the Celestron OAG. It's a tank and it's amazing and it's the single best OAG I have used. But it uses a lot of back focus, so it's better to reserve it for SCTs or Petzval design refractors...
@gregerianne3880 11 ай бұрын
Amazing timing, Cuiv! I just got my EdgeHD 8 a few days ago and have been testing it and I've been talking myself out of trying the OAG I got with it in favor of a familiar guide scope/camera. Time to stop wussing out, I think, and put the OAG in the image train. Of course, using the external guide scope (an AT60EDR with a LONG focuser tube hanging out 🙄) I noticed elongated stars, even though the total RMS guiding error with my AM5 was in the vicinity of 0.4" for a good amount of the time. What did I expect with the saggy focus tube? Anyway, thanks for the 'encouragement' from afar! I'm going to try out the OAG and just bite the bullet and iron out whatever issues arise.
@CuivTheLazyGeek 11 ай бұрын
Ooh yes I had the EdgeHD8 a long time ago and an OAG is critical! The Celestron OAG by the way is a work of art, and when paired with a large sensor guide cam like a 174 it works beautifully!
@gregerianne3880 11 ай бұрын
@@CuivTheLazyGeek Well , we will see tonight! Can’t wait to try it out. Thx so much again. You got me off my butt and everything is set up. 😊
@Dennis-tf2cs 11 ай бұрын
The OAG will serve you well. Make sure the OAG has a larger prism and get the right camera for it.
@gregerianne3880 11 ай бұрын
@@Dennis-tf2cs Thanks, Dennis. Yes, I have the Celestron OAG paired with an ASI174MM Mini. So far tonight, the guiding has been under 0.5" total RMS (usually about 0.4") with the 0.7x reducer. (The RA and DEC have been pretty much equal and around 0.25-0.30" each.) I think so far, so good! The OAG seems to be making a definite improvement.
@luisjosedl14 11 ай бұрын
Hi Cuiv! one question: I'm planning to buy the zwo am5 and I have a Newtonian 650/130. Do you think that is necessary to buy the pier extension for the mount? Because I see that you are not using it even with your telescope which is slight bigger than mine.
@luisjosedl14 11 ай бұрын
ooh! I forgot to mention that my Latitude is very low: 8 degrees. (Trujillo, Peru)
@jasonpatterson8091 11 ай бұрын
This is one spot where I've really struggled. I bought a thin OAG for my 1000mm reflector and just continually struggled to find stars to guide from if I wasn't in a really dense star field. Unfortunately because I use my DSLR the spacing requirements are such that most OAGs just won't work (with a coma corrector) due to backfocus issues and I think that the options available just aren't great quality.
@CuivTheLazyGeek 11 ай бұрын
Thin, tiny prism OAGs on relatively large focal lengths are problematic indeed ..
@jasonpatterson8091 11 ай бұрын
@@CuivTheLazyGeek That was exactly it I think - the prism was just teeny weeny and couldn't pick enough of the sky to get a good look at the universe. C'est la vie.
@louisrosner7902 11 ай бұрын
Another great video. One of the problems I seem to be having is that even though my filters are supposed to be parfocal, there is some slight change each time a focusing routine is done at filter change, and that throws the OAG camera, which is in front of the filters off a little bit. I then have to refocus the OAG by hand. Do you find that same issue?
@CuivTheLazyGeek 11 ай бұрын
PHD2 is fine with stars slightly out of focus - unless you have wildly different filter thicknesses, I find I don't need to refocus the OAG - it still works fine.
@IronMan-2024 Ай бұрын
Just curious if you have a 533 square sensor. Is there enough clearance or will the OAG cover part of the sensor?
@CuivTheLazyGeek 16 күн бұрын
Definitely enough clearance! The 533 is still a small sensor
@shanekelly4836 11 ай бұрын
Would the new ZWO Camera with guider built in have the same effect of fixing this issue?
@realmcerono 11 ай бұрын
Almost. the issue with the duo is you can't place the guiding camera in front of narrowband filters and therefore there is not much light hitting the guide sensor BUT most of the time it is still working fine.
@felipeleon_astrofotos 11 ай бұрын
I'm using (or trying to use) an OAG with a FRA500 and its reducer. The big problem is that I'm having massive comma at the guiding camera. In theory, the prism is inside the image circle that the reducer should deliver with flat field. What could be another reason for this trouble? May the prism be with a failure? Backfocus? I'm using Player One FHD-OAG MAX.
@MrMaunotube 11 ай бұрын
What about cameras with more than one sensor like ASI2600MC DUO? Have you tried one like that?
@CuivTheLazyGeek 11 ай бұрын
Not yet, I want to though!
@ravnica1 11 ай бұрын
What is a full well capacity of the camera that needs 5 or 10 minutes exposure time? Imaging from light polluted areas adds even more constraints. OAG appeals because the setup is more compact, I don't know if there are additional benefits in terms of more accurate tracking
@CuivTheLazyGeek 11 ай бұрын
Narrowband :)
@patrickmcvittie4971 11 ай бұрын
My OAG + guide camera added too much weight to the focusing assembly on my MN190. Ended up ordering the ASI2600mc Duo to see if that will work instead.
@CuivTheLazyGeek 11 ай бұрын
The Duo looks really neat! Finally with recent CMOS technology the idea became viable :)
@seafurymike 11 ай бұрын
I can’t get my camera to show images during the day. You skipped over this on your video, can you explain what you used to capture the image and what settings you needed for it to not flood the sensor? I also think I need to move my primary mirror inwards to get the offset the same between the cameras. Is there an easy way to measure from the prism to each camera chip?
@radioparisment628 11 ай бұрын
Thank you Cuiv. What do you think about O.N.A.G. ( On Axis Guider ) ?
@CuivTheLazyGeek 11 ай бұрын
I think it's a great idea but I've never tried it! Last time I checked it did use a lot of backfocus, not sure if that's still the case
@radioparisment628 11 ай бұрын
@@CuivTheLazyGeek Indeed : 66cm for standard, 68cm for the big one ( if i'm right ). It's good for RC, refractors, not newtonians. The main interest is that you uses the guide camera with short frequences to control. A diffraction cross is created and the soft controls the shape that varies with the focus error. As an example Peter Rejto, a TEC APO 180FL owner uses this system with excellent results. But there's an accessory, a special lens to screw in the guide camera that creates the same cross able to be controlled by the soft. With this, you can use it in the OAG system, i.e. newtonian... Is it worthy compared to our regular system ?
@woody5109 11 ай бұрын
Is back focus measured from the focuser to the sensor or from the coma corrector to the sensor? My coma corrector sticks out 45mm from the focuser.
@CuivTheLazyGeek 11 ай бұрын
From CC flange to sensor!
@woody5109 11 ай бұрын
Thank you, I’m determined to make this work, so 83.2mm from CC to sensor 👍
@KarasDrinksCoffee 11 ай бұрын
I thought that TP's guiding camera would have a focus issue with other brands' OAG because of the "short neck". it would result in a longer back focal distance.
@CuivTheLazyGeek 11 ай бұрын
That's exactly the issue I'm having here (although Touptek guide camera), so I couldn't use the helical focuser - still in the end it was easy to focus :)
@SpaceCityAstro 7 ай бұрын
Would you be willing to share your AsiAir settings for the OAG guide cam when used with the AM5? I have a similar setup and am struggling to dial in my settings. Looking for your values for: Calibration step time, max DEC duration, max RA duration, Bin2 or not, stability, settle time, timeout, guide cam exposure length, RA aggressiveness, DEC aggressiveness.
@CuivTheLazyGeek 7 ай бұрын
I don't use the ASIAir with this setup...
@SpaceCityAstro 7 ай бұрын
@@CuivTheLazyGeek Okay then, maybe your NINA settings? They should still work as it's the same basic setup, and same mount.
@realmcerono 11 ай бұрын
I have the ZWO OAG for years... and I hate it ;-) but its not the OAG's fault... imagine you have big SCT's 2000+mm focallenghts (thats where the OAG is a must have) so there are already not much stars around, then combined with a camera like the 120mm you are just lucky to see any star. so choose your OAG camera wisely (choose not the smallest sensor...) and maybe better go with the OAG-L with the bigger prism. I really don't like to adjust my composition based on guidestars visible in the OAG rather than my own artistic choices. btw. I use the exact helical focuser you wanted to use. you have to insert the camera as far as possible into it and it should work but it will be depending on the camera you use.
@CuivTheLazyGeek 11 ай бұрын
You may even have the old version of the ZWO OAG, which is horrible (didn't have the grub screws to actually stabilize the stalk)... If you have the backfocus for it, the Celestron OAG is amazing!
@krystlih 11 ай бұрын
Have you had a chance to test it under the stars yet? I'm curious star shapes on the guide camera. I've had issues getting decent star shapes using an OAG with this scope. Probably my issues we related to collimation more than anything. Having said that I know star shape shouldn't be SUPER important, but I've seen super weird shapes and it feels like the seeing conditions would cause those shapes to change which in turn makes PHD2 affect it's centroid calculation, as a result I have had way worse guiding using a OAG than a separate guide scope. But I really would like to get it to work in particular with this scope. I think these thin rolled steel chassis can have flexture in themselves which can cause issues with guiding. I've had the most success pairing this scope with a Evoguide 50 guide camera.
@realmcerono 11 ай бұрын
as you said, starshapes shoudn't matter for guiding. my stars looks mostly horrible in the OAG and guiding is totally fine.
@krystlih 11 ай бұрын
Yeah I was operating off that same thought process but in practice my guiding was way worse. As I mentioned it may have been mostly collimation issues that were my issues which was throwing the shapes WAY off.@@realmcerono
@CuivTheLazyGeek 11 ай бұрын
Back when I was using the EdgeHD800, my star shapes in the OAG were terrible (like little comets) but the guiding was working without issue :)
@ijontichy7179 Ай бұрын
ZWO 1,25" helical focuser seems to be totally useless with the OAG. It's frustrating to see my ASI290MM Mini camera can't reach focus due to the excessive length of the focuser and the weird mushroom shape of the camera. Did ZWO even test it?
@beatsntoons 11 ай бұрын
what's the weight of that scope/camera/focuser setup Cuiv?
@CuivTheLazyGeek 11 ай бұрын
I'm actually not even sure... because I use the AM5 as a mount I didn't need to care :)
@beatsntoons 11 ай бұрын
@@CuivTheLazyGeekha, fair enough. I ask because I've also got the AM5, and I'm near the 20kg limit, so just curious as to how much you've pushed the weight. I've seen the performance drop the heavier I've gone (obviously!). All good though, good luck!
@BrokenPik 11 ай бұрын
let us know how your star circle/circumference are. mine were long skinny lines that PHD could not lock onto.
@CuivTheLazyGeek 11 ай бұрын
They are very round in the OAG, didn't have any issue doing guiding (and even multiple star guiding)
@BrokenPik 11 ай бұрын
@@CuivTheLazyGeek ok will follow your setup, i have the same OAG but on RC6 with 533MC plus F5.8 reducer.
@azastro919 11 ай бұрын
I got this same oag but for some reason there are a bunch of swirls in the bottom left corner of the image and all the stars are either huge or elongated lol
@CuivTheLazyGeek 11 ай бұрын
The OAG sees the edge of the imaging circle so the guide cam will see elongated stars very often! But it should still guide!
@azastro919 11 ай бұрын
@@CuivTheLazyGeek ya my other problem is this is I'm using 1.25 inch filters with a micro 4/3 sensor so no wiggle room lol
@paulomribeirojr 4 ай бұрын
And how about reframing? I suppose that if you rotate camera only you may get obstructed by prism. Rotating camera and OAG you need to recalibrate guiding...
@naegeleh 11 ай бұрын
I tried to use different OAGs with my full frame Zwo Asi 6200 camera. But for me it was never possible to put the OAG in a position not interacting with the sensor. Frustate I gave it up and go back to a separate guide camera. Any comments?
@realmcerono 11 ай бұрын
strange, ZWO does advertise its own OAG-L for its fullframe cameras: The ZWO OAG-L is designed specifically for ZWO full frame and some APS-C sized cooled cameras.
@CuivTheLazyGeek 11 ай бұрын
Yep, OAG-L is built specifically for that use case... Maybe it didn't exist at the time you tried?
@leboch65 11 ай бұрын
May i know why u seems to be losing interest in yr C6 and hyperstar rig compared to yr newtonian? Is it because this newtonian rig gives u better pictures though it isnt operating at f2,?
@cooltyn 11 ай бұрын
1. Terrible star shapes and wrong center calculating in phd2 with atmosphere turbulence. 2. Sometimes there is no stars in field of view with 120mm camera and 200/1000 newt. 3. Focusing main camera = defocusing guiding camera. 4. Darker image in guider. Happy with 60/240 hard fixed guider at the lossmandy plate on top of tube rings. Get 0.4 rms at heq5pro and no trailing stars. Guider and main scope are collimated, and good polar alignment, of course.
@CuivTheLazyGeek 11 ай бұрын
Glad it's working for you! My stars in OAG are very round with no issue in PHD2 (at least for now!) and my shorter FL will make it easier to find guide stars during the galaxy season :) My guess is your newt is of better quality than mine too :D
@cooltyn 11 ай бұрын
@@CuivTheLazyGeek i think no - sw200pds without coma corrector)
@CuivTheLazyGeek 11 ай бұрын
@@cooltyn oooh the lack of CC would explain your OAG star shapes haha! But good you're not having troubleotherwise!
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