A "Classic" Big Dobsonian - The 20" Obsession Telescope

A "Classic" Big Dobsonian - The 20" Obsession Telescope - Go Big or Go Home!

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Күн бұрын

Link to my 15" Obsession UC Review: • Review of the 15" Obse...
Link to my 12.5" Obsession Classic Review: • Review/Overview of the...
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Пікірлер: 245

@ChadMello Жыл бұрын

When I was a young man (a long time ago), I would hang out many a summer night with a friend who used this very scope. It was amazing! My young eyes picked up brilliant color (reds) in the Orion Nebula, something my much older friend could not see. Details were so vivid and brilliant! My friend has long since passed now, but those memories and vistas are seared into my brain forever.

@avid_astronomer Жыл бұрын

Our local astronomy club inherited an Obsession 20" f/5 classic, and I was the only one in the club lucky enough to have enough free garage space to store it, so I'm in a similar position as Ed as being its caretaker rather than its owner. Still, even in my Bortle 8 driveway, it can punch through the light pollution enough to bring in some faint fuzzies that my 12" can't come close to seeing, and when I show off Jupiter and Saturn with it to the neighbors, they are all blown away. The only real downside (other than it taking about 15 minutes for me to get set up and collimated) is that climbing up and down the ladder all evening makes me tire out quicker. But then again, all the step climbing will strengthen your legs ilke a runner, which gives a new meaning to doing a Messier Marathon!

@marcpopick248 Жыл бұрын

It’s come to the point that I click “like” a new video from Ed before I even watch it.

@ali_adeeb Жыл бұрын

Same😂

@sashnbash Жыл бұрын

Yes i remember waching it sometimes ago..

@Clark-07 Жыл бұрын

Same here😅

@alphaadhito Жыл бұрын

Sometimes you do that without consent of yourself and confused at the end of the video why the hell the like button was already clicked 😁

@hooper365 Жыл бұрын

I have reached that point also

@stuartriley Жыл бұрын

My friend owns the Obsession 20-inch and he uses it constantly. He just recently returned from his trip to New Mexico and he has had only grumpy jester of being back home in Missouri. I am envious of his trophy telescope, but my ability to lift and move is well declined since I turned 75-yrs.🎉. Great review and thank you for your time and support of your video channel.

@thegood9 Жыл бұрын

I owned a 25" from Obsession. I miss that baby. The sessions with that machine were memorable for a lifetime, and every single person I ever showed the sky to with that baby remembers it. Every one. I have great memories of my mom and dad viewing with it as well. I cannot believe I let it go when we moved. I miss it a lot.

@kevinbarber2795 11 ай бұрын

Dude, I wish I had that!

@f4ucorsair153 13 күн бұрын

You never let something like that go. You only have one life.

@thegood9 13 күн бұрын

@@f4ucorsair153 Totally agree. I miss her.

@johnadams9044 8 ай бұрын

I had a 20" for 15 years. As I got older, I sold the 20" and moves down to an 18". The 18" is much more manageable and only loses a very small reduction of light grasp from the 20.

@darkl3ad3r 4 ай бұрын

You deserve a lot more credit and recognition than you get for your work here. You're the real deal, and your passion for this hobby comes through in every video.

@edting 4 ай бұрын

Thanks. One reason I haven't "grown" all that fast in the past 25 years is I don't participate in sponsorships, affiliates, and I refuse to be a spokesman. I also do little to no promotion of this channel. The people who are here want to be here!

@NatarajanGanesan Жыл бұрын

Always a pleasure to watch your videos 😊🙏🏻

@Sergey_Sergeev Жыл бұрын

Thank you for the effort, Ed!

@MW-hf5nk Жыл бұрын

Thanx, Ed. Great video as always!

@ricardocalderon1721 Жыл бұрын

As always your video is excellent and useful...thank you.

@LepERMeSSiah222 Жыл бұрын

Love these videos Ed! One thing I would like to see more is when you do close ups of smaller details. Loved when you showed a detailed view of the mirror cell and the way the UTA is mounted to the truss poles.

@guyjordan8201 Жыл бұрын

13:25 😮 OMG that primary cover is necessary! You actually made this large scope seem manageable. Thanks Ed.

@hakksaw Жыл бұрын

Was just gonna comment on that. I watched that fastener fall and bounce off the cover. Whew!! 👍🏽

@theyodax7926 Жыл бұрын

@@hakksaw I have taken the time to Mar the threads on the end of the screw so this can't happen. seems like it would have been something Dave would have done at the shop before shipping.

@YFA912 Жыл бұрын

I love so much your videos, that I click 👍 and then I watch it, I never been disappointed, greetings from Paris 🇫🇷

@enriquecancino7519 Жыл бұрын

Ed, I think that this is one of the best reviews I've seen from you, ever! The details of the scope's construction and basic operation are superb. The pace and description of the steps to put it together are also way up there, but I also like your wheelbarrow carrying cart and the plywood platform with casters, both of which are going to motivate to solve some problems on their own without having to buy everything already made, which costs money and doesn't teach you anything. Good job, Ed.

@ADF_Cable Жыл бұрын

Thanks Ed, great scope, great review! Viva la televue!

@jifi-0178 Жыл бұрын

I've only seen these 20" "beasts" on your channel and will probably never see a physical, real-life version. For that and many more reasons, I enjoy your channel content, Ed. This expands my knowledge of the telescope universe 🙂. So much to learn and enjoy here.

@e.l.robbins5614 Жыл бұрын

My granddaughter and I are new Skywatchers, and this was an amazing video for us. We watch all your videos. Thank you

@Beanerds Жыл бұрын

Ed , awesome mate ! , I have 2 friends down here in Darwin Australia with home built 20 and 22 inch f5's using the sweet Obsession design and the things that I have seen in these 2 scopes out at our Northern Territory dark sky sight !!! . Lost in the cluster of galaxies as you mentioned it blew me away ! yes we can see well it from 12 degrees south . Makes my C9.25 look like a finder . But it does perform very well at the observing site . Yes this is where you see things that only a handful of people have seen . Thank you for this great review as always thanks mate .

@skygazr33 Жыл бұрын

Picked up my 20” f5 at Dave’s dentist office in Madison in May 1997. Love the scope!,

@kermitzforg Жыл бұрын

I’ve got the 22UC and it’s great!

@jrpstonecarver Жыл бұрын

My stomach flipped when the turnbuckle part dropped onto the mirror box cover. Yikes!

@edting Жыл бұрын

Yeah I was wondering if anyone would say anything.

@tubedude54 Жыл бұрын

@@edting And that was right after you said to leave the mirror cover on so you wouldn't drop something on the mirror...

@randallrogers6350 Жыл бұрын

I had a friend whose secondary mirror came unscrewed and fell on his primary, a 32". It broke ⅓

@MrGp3po Жыл бұрын

Wonderful video. I have all of those atlases. My early 1980s Wil Tirion is the black on white background and is amazing. Yes, I have 3 or 4 of those Crown Royal bags and they are great for telescope parts and pieces like asiair, finder scope, eye pieces, etc. Nobody should every throw away a CR bag!

@rowgegaming5048 Жыл бұрын

my heart stopped at 9:04 when the wind moved the ladder LOL

@edting Жыл бұрын

My ladder is awful. I need to replace it.

@ruperterskin2117 Жыл бұрын

Cool. Thanks for sharing.

@trevorpitt406 Жыл бұрын

Hi Ed, thank you for this and all your informative reviews. However, I was just looking through my paperwork that came with my 20 inch F5 Obsession and see that you did a review of the same scope in October 1999 and even described the unboxing of the scope ( not that it was yours). Interestingly you also mentioned the 35mm Panoptic in that review. My favourite EP is a 17mm TV Ethos for Deep Sky and a 6mm Ethos for Lunar work. A couple of comments, after climbing the ladder to put on the upper truss assembly a couple of times, I thought there has to be an easier way and now install as per your demonstation of the cam lock at a standing height. The heavy mirror is an issue but a gentle lift and I tie the scope in position using the wheelbarrow fixing screws with some rope, mine have steel eyes so its an easy job and easily strong enough to counter the weight of the mirror. Second point is that its my ready to go scope as I leave the wheelbarrow on in the garage. When its clear, I roll out from the garage and take of the upper truss cover and its ready to go ( the garage is not heated so mirror cooling is minimal). Too date, I have never fallen over the handles, but suspect I will do one day. On completetion, wheel it back in and replace the upper truss cover.

@OkieBobby Жыл бұрын

Ed 'The Man' Ting, continues to crank out life saving videos! This is my new favorite video of yours. Which is saying a lot, since you have made some fantastic videos. A year ago, you introduced me to Obsession Telescopes (video was titled "Review/Overview of the 12.5" Obsession Telescope). In that video you made a comment that these telescopes were a niche that appealed to certain people. I must be in that group. I immediately was impressed by the form meets function of the beautiful Obsession classic models. Right after viewing your excellent video of the 12.5", I ordered Kriege's book with a dream to build my own. Month's later, while shopping for a mirror for that build - I came across a 20 year old 20" f/5 Classic Obsession for sale, and ended up bringing it home. Recently took it to a star party. There I was able to compare it with other scopes of similar aperture, and even a 30" Dob. I see no need to go any larger. Actually, I never considered going this large, but couldn't pass it up - and have no regrets. Mr. Ting, thank you for introducing me to this magnificent functional piece of art. Oh and thanks for this most recent, amazing video, which is super helpful. I had been wondering about the mirror weight, and total weight. My guesses were way off. Also, I didn't know the trick about the truss poles next to the bearings; very helpful. Guess I need to head to the liquor store to get a Crown Royal secondary mirror cover. Many thanks!

@edting Жыл бұрын

Good job on getting the 20"!

@ducatifriedrich2910 Жыл бұрын

Ed, your vids are SO entertaining and useful, you are a master! I once bought an 18" Obsession, and after 2 years of getting it out so infrequently, I sold it. More recently I bought an Explore Scientific - Gen II - 12-inch, put it on a wheeled platform with 5" wheels, and I can roll that out of my garage in less than a minute. As much as I loved the quality of the Obsession, as they say, your best telescope is the one you use! Never heard of G1 before, sure glad you included that in this vid.

@skysurfer5cva Жыл бұрын

Under good skies, G1 is easily within range of your 12". It has a magnitude of 13.7 and it shows a little bit of size. Also, it's off the southern end of M31, so you're not trying to pick it out from the glow of the galaxy like most other M31 globulars. G1 is plotted in the Interstellarum Deep Sky Atlas (p. 27) and in the downloadable TriAtlas (TriAltas has three scales, the B and C atlases show G1; see pages B10, B25, and C125). For detailed finder charts, I use SkyTools and the free Cartes du Ciel. You can also search the Internet for finder charts for G1 prepared by others. I have seen G1 in my 8" SCT with effort (first time was five years ago), and I have read reports of sharper-eyed observers spotting it in a 6". G1 is easy in my 11" SCT. Most of my observations have been under Bortle Class 2 or Class 3 skies at elevations above 6000 feet in California's Sierra Nevada range (Kings Canyon National Park, Sequoia National Park, and Courtright Reservoir) or on the eastern side of the Sierra Nevada (West Portal Scenic Viewpoint near June Lake, just two weeks ago, and Convict Lake). However, this summer I also spotted G1 from an elevation of only 600 feet in the Sierra foothills (Millerton Lake) under Bortle Class 4 skies. With my 11" SCT, I typically use magnifications between 70x and 350x, but I usually settle on my 13-mm TeleVue Ethos and 215x for the best view. In addition to G1, this summer I added three more M31 globulars to my life list using my 11" SCT: G76 (m14.2), G78 (m14.3), and G280 (m14.2). I will next try for G213 (m14.7) and G272 (m14.8). Both SkyTools and Cartes du Ciel nail the location of G1, but Cartes du Ciel more accurately plots G76, G78, and G280. Back to the subject at hand, I agree that's Ed's video was excellent. Personally, I don't want to own a scope that big, but I want to know people who do. 🙂 Members of my club currently have an 18" and a 20" Obsession and the club owns a 20" Dob that was built in the 1970s (IIRC) and rebuilt about ten years ago. In the past, we also had members with 24", 25", and 30" scopes.

@deepskymike767 Жыл бұрын

Another top video Ed. I owned a large 18inch scope. I loved it at first but it became a chore to get out and set up. Up and down a ladder multiple times began to get annoying, not to mention precarious, so I sold it and went back to my 14inch which I could keep set up and just wheel out and use it 3 minutes flat. No ladder required. Observing then became enjoyable again. The large scope after a while made me dread a clear sky whereas with my 14 inch I actually look forward to using it every clear night.

@edting Жыл бұрын

Yes. As a general rule, a 14" -15" is the largest scope most people can use with both feet on the ground. An 18" is a one-step scope. Above that, it's Ladder Time.

@edf2953 Жыл бұрын

Excellent review Ed. Very informative and interesting. You mentioned that it is okay to store this scope in a garage. Is it safe to also store a refractor in a garage year round in the Chicagoland area. Thanks and keep up the great work. Ed.

@VladLoso Жыл бұрын

the humor in this video was just down my alley

@chrisg9602 7 ай бұрын

So awesome

@theoldar Жыл бұрын

I had a 22" UC, and I eventually sold it to a friend. I just wasn't using it enough. I now use a C11 because it is ready to go in less than three minutes.

@randallrogers6350 Жыл бұрын

I have a 20" classic and a C11.

@tjzambonischwartz Жыл бұрын

I've also seen G1 through a 20" telescope (a Starmaster) under Bortle 2 skies. That was definitely one of the most memorable views I've ever had.

@mojojojo7923 Жыл бұрын

I LOVE BIG DOBS, AND I CANNOT LIE…..

@jc4evur661 Ай бұрын

What's G1? or did you mean M1?

@davel4724 Жыл бұрын

Hi Ed, Many thanks for the review. I got one of these 16 years ago and still going strong, I get to use it under a bortle 2-3 sky on moonless weekends when its not cloudy/raining. This might shock you but this things isn't just a DSO scope, under decent seeing it is absolutely stunning on the planets, I use a 2x powermate and a zeiss binoviewers and zeiss eps on them, and if the seeing is poor, I can stop it down to 6 or 7 inches off axis unobstructed, there is enough room in the spider arm spacing for that. If you ever tried it, I'd been keen to see what you think of the views vs what you can see in the 4" Takahashi scopes.

@thomasw4422 Жыл бұрын

Obsession seems like a good word for it, wow, that's a dedicated person's device

@SpykerSpeed Жыл бұрын

Great video! I subscribed.

@tyggeln Ай бұрын

I've got our club 20" Obsession and have the same Crown Royal bag on the secondary!

@astralfields1696 Жыл бұрын

Wife: Your 8 inch DOB is too big for our living room. Me: Honey, I found an interesting telescope, look at this video ❤

@VirgilTStone Жыл бұрын

Get rid of the wife.....

@nomisastro2000 Жыл бұрын

Faboulous video Ed. I've had the pleasure of looking through this scope twice over the years, three years ago gifted the view of the pillars of creation, like it was a photo in a magazine and quite a few years before that the super nova in a spiral arm of M51. It's a beautiful instrument. However, I am the very happy owner of a Taurus T400 (16") ultra light dob - which is a work of art in its own - and just a few weeks ago an observing buddy of mine set the challenge of trying to see G1 and I was excited to give it a try. I found it myself after just about 5 minutes of slow star hopping and constatnt looking at the map print out he brought with him. Sure enough I confirmed the stars in the FoV and changed eyepiece to my 4.7mm Ethos and there it was in its splendor! Averted vision helped a lot and right between the two brighter forground stars you could see the smudgy fuzz that is G1. A genuine thrilling moment. It's these kinds of moments and experiences that bonds you to your instrument and creates an emotional connection.

@marcpopick248 Жыл бұрын

Who has making the optic? The Taurus looks nice. Does it hold collimation good. How does the star test show

@nomisastro2000 Жыл бұрын

@@marcpopick248 Taurus makes their own mirrors. There is professional and standard grade. I went for standard and the glass is from GSO but he does all the coatings. The professional mirror comes with a tesr cert. Collimation is outstanding and has the best collimation system I have ever seen and used. Stars are ultra sharp in my eyepieces. I have a video overview of my scope on my channel.

@singedcarry Ай бұрын

This is what I want to own. A 16-20" dobsonian. I wish i could afford one. I want to build a permanent structure on the top of my barn for something like this.

@soupsock9743 Жыл бұрын

There were two giant obsession scopes and one smaller but still giant one at the Nebraska star party. I got to look through all three of them but the smaller one was the best because one of them was just focused on a random area of stars and the second was out of focus, plus I had to climb crappy ladders to use both. I was the perfect height to look through the smaller one (18”), and I saw the dumbbell nebula and the great cluster in Hercules and they were amazing. One of the giant scopes was 24” and idk what the other was but it was somewhere around there as well. It was really weird too because I brought my 12 incher and everyone I told said “oh yeah, nice little scope!”

@randallrogers6350 Жыл бұрын

24" might have been a Starmaster. I had a 22" Starmaster with Zambuto mirror and goto/tracking drive.

@MM0IMC Жыл бұрын

13:26 A good example of why you keep the primary mirror covered!😱

@lungotevere Жыл бұрын

Thank you for your informative and inspiring piece on the 20" Obsession Telescope. I have the money, but I'm not sure I have the sky, or that my house here in West Virginia is suited to it.

@jessegodsey Жыл бұрын

At 5:36 it sounds like you said "Formica, this is flooring laminate here", which actually, I believe, should have been, "This is countertop laminate here".

@perry3928 Жыл бұрын

Hi Ed. Thanks for the video. Tho I would never own one I like to see what's out there and what they're capable of.

@photonjones5908 Жыл бұрын

I have the 25" f/5. Can't hardly even begin to tell all the great DSOs I've seen and shared, all the good times with friends and astro classes too. It is a beast but the set-up is quite doable fo one and super eaay for two, but I'm in my sixties and may need to downsize to a 20", although I have a great 17.5" too, there really is nothing like an Obsession: such a beautiful instrument and tough enough to take to the darkest skies, for decades .

@tarang221 Жыл бұрын

I want to see the images you took from your monster

@photonjones5908 Жыл бұрын

@@tarang221 Hey, that's cold.... But in fact I have imaged Jupiter and Saturn through the eyepiece, using my phone (no mean feat) but you know, the scope is neither motorized nor EQ mounted so they were ...all right. No quasars with an android. ;/

@tarang221 Жыл бұрын

@@photonjones5908 I understand I have a 127mm mak on little dobsonian mount...no eq no motor so it's tough to manually track

@randallrogers6350 Жыл бұрын

I owned 2. One was stolen and recovered after I purchased another replacement. I added ServoCat and Argo Navis.

@jona5003 14 күн бұрын

I'm only 17 but I already know that I am going to buy a gigantic telescope when i'm older and can afford it. They better not stop making such beauties! (They should also bring back the classic already, I just love seeing that telescope. Its a work of art)

@projectnemesi5950 Жыл бұрын

I love your channel dude, even if we disagree on when to use a full frame camera. lmao

@lowellmccormick6991 Жыл бұрын

The first telescope I looked thru was a 15" Obsession with Pentax XL eyepieces. Excellent views. It led me to buy a 16" Nightsky with Pentax XL eyepieces. The bottom assembly of the Nightsky weighs 154 pounds, with wheelbarrow handles. When I bought it, I had an S10 pickup. Now, three generations of Silverados later, the tailgate is 12"+ higher and the 6' long 2x8 ramps are really steep. The scope has given me multiple hernias. I recently built 12' long ramps that makes loading the scope much easier. I'm thinking of adding an electric winch to make loading even easier. I have to take it on the road for dark skies. I prefer the truss design and the whiffle-tree mirror cell of the Nightsky but an Obsession is an excellent telescope..

@OkieBobby Жыл бұрын

I hadn't ever considered a winch, but that is a great idea. Thanks!

@duanecjohnson Жыл бұрын

@@OkieBobby Boat strap winches also work nicely. redrok

@benbowland Жыл бұрын

The intro on this video really reminds me of Doug DeMuro! You're both great reviewers.

@edting Жыл бұрын

Nice to be compared to Doug DeMuro!

@Volundur9567 3 ай бұрын

Looks a lot easier to move than the solid one you had on your beginner telescopes video (10 and 12-inch Celestron).

@ulrichsd Жыл бұрын

I want one :)

@RS-jz2yu Жыл бұрын

Hey Ed, congratulations on another outstanding video. I recently picked up one of these that was built in the 90s. I would like to upgrade the focuser. It looks like that one has a Feather touch on it. Do you know if that is the one that Obsession provides as an option or if it was purchased aftermarket? Either way, I would love to hear your opinion on it, any recommendations that you might have and the model number. Thank you Ed!

@edting Жыл бұрын

This one has a Feathertouch focuser on it. It's wonderful, but if you have the JMI DX series, I think those are just fine.

@johncarter1150 5 ай бұрын

The immediacy/intimacy of direct observation!

@martinlagrange8821 Жыл бұрын

The term 'Tube in a Box' nails down the aesthetic of Dobsonians in general. I've got an Explore Scientific 10" Hybrid Truss (Serrurier), which seems to be 1/2 size version of this...would love your review of that one.

@taraswertelecki3786 10 ай бұрын

I have looked through 18, 20 and 25-inch Obsession Dobs, and built my own 15-inch truss-tube based on the Obsessions. I was NEVER disappointed with the views through any of them, even from light polluted sites the views are amazing. The only drawback to them is I don't like climbing tall ladders in the dark, because I have fallen off a ladder. For that reason and the fact I have to keep my Dob in the house, I opted for building a 15-inch F/4.5. I have seen most of the globular clusters visible from the northern hemisphere as well, and definitively seen one extra-galactic globular cluster, NGC-1049 which belongs to the Fornax Dwarf Galaxy.

@jc4evur661 Ай бұрын

I don't think there's THAT much of a difference when viewing between an 18" and a 25" Yet there is a BIG difference between them when it comes to price and transportability.

@robgerety Жыл бұрын

Very cool. I wish I was on your list of star gazing social guests! I assume you are in Hanover area. I am in Hartford VT. I think we are B5ish. Correct? But, there are B2 areas not to far from here.

@kamesuph7790 6 ай бұрын

Very nice,how many combined weight of the mirror and mirror cell is and do you need to add counterweight at the bottom ?

@JoshBreakdowns Жыл бұрын

If anyone else has a 20" Telescope they're not using I would be willing to be generous and put it to good use for you 😁

@Astronurd Жыл бұрын

I’m pretty sure that I would want to increase the magnification well beyond the 80x with a 31mm Nagler!

@edting Жыл бұрын

It may just be me but I find tracking by hand above that power to get tiresome.

@Astronurd 11 ай бұрын

@@edtingGood point. It does become a pain especially if you are standing on steps. Clear skies Ed.

@dirkfierce2525 Жыл бұрын

At 13:23 is why you leave the primary mirror cover on until last...

@TucsonBillD Жыл бұрын

😊Ed… nowadays you should mention that for that drop light you refer to, it must have a incandescent bulb in order to generate some heat. A LCD bulb won’t work. Also, give a recommendation for the wattage so it will heat the cell evenly and gently.

@edting Жыл бұрын

Yes, good point!

@johnsmith1474 Жыл бұрын

Lcd still generates a lot of heat, it's just at the circuitry, which is why they all have heatsinks. In any case I'd suggest a heater for heat, not a light.

@maxgrass8134 Жыл бұрын

Thanks, great video as always! When you sas you saw a globular cluster in andromeda, do you mean you took a long time exposure and stacked photo or did you see it with your „bare eyes“ straight through the telescope?

@edting Жыл бұрын

You can see G1 and a few others with your eyes, if you know where to look. It isn't easy and it's not "exciting" looking in the conventional sense, but just think about what you just accomplished.

@anata5127 Жыл бұрын

Could you please do review Vixen versus Takahashi refractors? And another one AP versus TEC refractors.

@Herman-zc7te Жыл бұрын

Nice

@artsbandit2143 Жыл бұрын

A prince amongst men

@BlackThunderRC Жыл бұрын

Still remember the day I took a look through a 36" telescope at M13. Will never forget it.

@randallrogers6350 Жыл бұрын

Larry Mitchell's at the TSP?

@BlackThunderRC Жыл бұрын

@@randallrogers6350 Not a clue who that is or what TSP is as well lol

@woody5109 Жыл бұрын

I think having a small reflector would keep a guy occupied when my photography setup is doing its thing. I’m coming around Ed, thanks for these.

@edting Жыл бұрын

That is what I do!

@marcpopick248 Жыл бұрын

The only thing some people do with the Obsessions is add the Glatter sling and fans for the 2 inch thick mirror. Some people say that it never really cools at all even with boundary layers fan

@edting Жыл бұрын

I miss Howie…

@georgehilario3544 Жыл бұрын

Why do they need fans ? Newbie here

@marcpopick248 Жыл бұрын

@@edting I never got to meet him but people say he was a very nice person. I think his wife is still active with his products and Teeter was using his slings as standard parts. Of course now Teeter is closing up shop. There is not to much premium dob builders now. The New moon and starstructer and sdm is only men standing.

@marcpopick248 Жыл бұрын

@@georgehilario3544 the fans help the mirror reach ambient temperature. If you live where the temperature drops fast and take telescope from warm house then you get bad images while mirror is cooling. This is why some people prefer borosilicate and zeroder and quartz glass (more expensive) as well as thinner mirrors because these mirror figure do not change to much. But thinner mirror means you need a better mirror cell design to hold it.

@dnjj1845 6 ай бұрын

Obession used to make a 30" scope but it was discontinued. Wonder how many people have one and it's holding up.

@keatoncampbell820 Жыл бұрын

As an engineer watching a video clearly being shared between the coven of astronomers and astrophysicists, I feel like an interloper watching a wonderful, if exotic (lol), ritual. Also I appreciate the bearing for its clever design and utilization of material, but something about half a bearing really shakes me to my core. It will never complete a rotation :(

@simonchung9813 Жыл бұрын

My retirement scope! Absolutely jealous you have one to use. Thank you for the very informative review, Ed. One thing not mentioned was how well the collimation holds not only after assembly but also panning up and down. Has Obsession improved the cam latching mechanism?

@edting Жыл бұрын

Yes it’s completely different now. Check my UC review.

@concernedcitizen780 Жыл бұрын

Everyone wants one of these things. Very few people can afford one of these.

@marcofailla Жыл бұрын

Absolutely sweet when talking about guilty feelings 😂 that’s true, you’re right 😘 but wow, now I have to find a viable 35 mm for my twenty inches dobson Ian 😂😂😂

@actudoran Жыл бұрын

one day ... I got this house in the northern suburbs of my city that's a B4-B5 zone ... I'd love to have one of those ☺️ we seldom spend the night over there but man ... I'd find any excuse to if I had a big dob just waiting to be rolled out... oh, I should mention that I have this portion of the roof of the storage facility reinforced to support a smallish 2-3 m wide obsy ... so ... waiting for that day ... obsy on remote action and big dob on a roll in and out whenever there for the night :)

@edting Жыл бұрын

Go for it!

@markstump7079 Жыл бұрын

Wow, now that's a scope.

@RideAcrossTheRiver Жыл бұрын

I like the portability of these smaller scopes.

@edting Жыл бұрын

You'll really like the portability of the 25" model!

@RideAcrossTheRiver Жыл бұрын

@@edting This is why nephews were invented!

@StargazerFS128 Жыл бұрын

That’s a big telescope you have there!, Ed

@edting Жыл бұрын

They get bigger than this one. I'm trying to get hold of a club member's 25". One issue is getting it here...

@StargazerFS128 Жыл бұрын

@@edting Nice! it begs the question, 5” extra aperture makes a huge difference when we’re talking about the average scopes like refractors and SCT’s but, when comparing big light buckets like a 20 and 25” is it really noticeable? maybe I’m not making sense but I feel like there’s a point where the difference in aperture has to be larger and larger as telescopes get larger and larger.

@coconutlamb2086 Жыл бұрын

Can you do a review on binocular telescope

@ricardodelacalle 10 ай бұрын

Is this a good beginner's telescope?

@StagnantMizu Жыл бұрын

what the limiting magnitude of that in like bortle 1 to 4?

@Doomclown Жыл бұрын

I kept hearing "trust" poles, I assumed because of the fear of the secondary falling on the primary.

@endurance11 Жыл бұрын

Hey Ed can u pls review the Hubble Optics UL14 or UL12

@edting Жыл бұрын

I haven't seen those yet!

@f4ucorsair153 13 күн бұрын

I had a privilege to be able to use 25 inch Obsession under amazing southern hemisphere skies. If you are a dedicated visual observer, you owe yourself one large aperture dob in your lifetime.

@edting 11 күн бұрын

I've been meaning to get to Lachlan and his ranch in Australia for some time.

@f4ucorsair153 10 күн бұрын

@@edting Ed, I have to say I am jealous of you guys from the States. You really do have some amazing skies. In Europe, its so hard to find great skies, as the towns and villages are so spread out, there is little "wilderness" in between. I must say however that the enjoyment I get out of the recent 12" BinoDobson I built is rivaling that of a 25 inch scope. Although the image scale is nowhere near, the immersiveness and relaxation at the eyepiece is something else, even under bortle 4 skies. The comfort at the eyepiece is second to none. If only there was a way to get it to that ranch, or the Namib desert... well one can always dream...

@MrRockfish01 Жыл бұрын

That’s one big telescope 😳

@danieljohnkirby9412 Жыл бұрын

Ed there's a jump scare in this video. Some weird whispery noise right at the top. I heard it scrolling through your videos in a quiet room and I thought a ghost was talking to me.

@johnkasianowicz6536 5 ай бұрын

Ed, are the wheel barrel handles on backwards? IIRC, you want to see the brass emblem when you wheel the primary + rocker box. Otherwise, the upper box with the mirror can fall out.

@edting 5 ай бұрын

I believe you are correct!

@johnkasianowicz6536 5 ай бұрын

@@edting I think so. I bought an Obsession 20” f/5 w/a pick of the litter Galaxy Optics primary in 1998. It was a stunning scope! Keep up the good work on your reviews (written & video). I greatly appreciate them.

@Airflores322 3 ай бұрын

Thank you so much for the video, I bet you can see the surface of Jupiter with that thing. Lol.

@Bobcatflyfish Жыл бұрын

Ed, I am looking into getting a narrowband/UHC filter for my 8" dobsonian, the scope has a 2" focuser with an adapter for 1.25" eyepieces, the adapter also has an internal thread for attaching 2" filters, I have a couple of questions: - if I use a 2" filter in the adapter with a 1.25" eyepiece, will there be any noticeable difference in viewing experience than if I were to use a dedicated 1.25" filter? - do you have any recommendations for narrowband/UHC filters for general viewing of nebulae?

@edting Жыл бұрын

When given the choice, always get the 2" version. There are many different variations of narrowband filters; each has their fans. Keep in mind those filters are not a magic bullet. Light pollution will reflect off the surface and back into your eye. Ironically, they function best when used under very dark skies.

@Bobcatflyfish Жыл бұрын

@@edting I usually take my scope up into the white mountains and northern Maine to escape the light pollution, my goal for the upcoming year is to try and check off as many objects in the Messier Catalogue as I can

@paulcaskey Жыл бұрын

Which PlaneWave telescope would you recommend for a beginner? Thanks.

@tubedude54 Жыл бұрын

The one meter on the alt az fork with field rotator.

@mimcan70 Жыл бұрын

Can you pls share the secondary mirror size for this 20 ' (and 10' setup).. thnkx

@randallrogers6350 Жыл бұрын

For 20" f5, secondary is 3.1"

@jessehuang5696 Жыл бұрын

What are your thoughts on the classic vs UC design? Would you get the 20 classic, or the 22 uc?

@edting Жыл бұрын

Check out my review of the 15" UC on this channel if you haven't already.

@danielbrowniel Жыл бұрын

has anyone ever made dobnoculars?

@sasquatchhadarock968 8 ай бұрын

Collimating must be a pain. Those truss tubes must be super stiff or the flex would be a major problem

@jackfrost4033 3 ай бұрын

Is it necessary to collimate the telescope every time it’s used ? Thanks

@edting 3 ай бұрын

I talk about that in the video. It depends on how picky you are. I find these Obsessions hold their collimation remarkably well and usually don't have to touch it.

@lancasterhypnotherapy Жыл бұрын

How would you recommend transporting this beauty to a truly dark sky site?

@edting Жыл бұрын

As shown in the video, the whole thing breaks down to fit in a small SUV. I've seen people fit two of them in a medium sized SUV, pickup, or van.

@otherwayup Жыл бұрын

I'm never going to buy one of these, but really would have liked to be shown a representative image of something you might see with it other than the globular cluster.

@randallrogers6350 Жыл бұрын

M 51 is spectacular!

@RoofMonkey911 Жыл бұрын

13:25 The point where your heart stops briefly!

@sofjanmustopoh7232 Жыл бұрын

200 lbs worth of happy photon gatherer 😁

@leatherindian Жыл бұрын

If I were the owner, I’d wonder how much care you’d be taking of my scope when I can hear you dragging the trusses on the ground as you pick them up. It’s not a lot. But it would make the owner shudder.