Practical Advice For Beginning Amateur Astronomers: Refractors

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Old Gazer

Old Gazer

Күн бұрын

This video is intended for inexperienced, beginning amateur astronomers.
The video is an overview of refracting telescopes and includes a discussion of refractor design, advantages of refractor telescopes, a discussion of chromatic aberration (false color) - what it is, what causes it, and ways to reduce or eliminate it, including use of doublet and triplet lenses and ED glass in the objective lens.
Field distortion is defined, and the use of field flatteners is presented as a means of eliminating field distortion.
Price points of different types and sizes of refracting telescopes is discussed, including representative examples of typical costs.
Music in this video is "So My Love - Instrumental Version", by Anthem of Rain
freemusicarchive.org/music/an...

Пікірлер: 28
@Boxxkarr
@Boxxkarr 7 ай бұрын
Thank you for explaining the differences of doublet/triplet and materials used to build telescopes. I was wondering why there was so much difference in price between refractors, now I understand! Clear skies Larry!
@Astronurd
@Astronurd Жыл бұрын
It’s the red and green light that is merged and blue is the one that causes the chromatic aberration (blue halo)
@ridleyroid9060
@ridleyroid9060 2 жыл бұрын
I recently got a 60mm refractor as my first ever telescope. Loving it, although I dont think I got a particularly good one.
@Nottsboy24
@Nottsboy24 2 жыл бұрын
I always encourage beginners to go to Astronomy Shows, Star Parties, Observatories and Science Lectures before purchasing their first telescope! It gives them an insight what Stargazing is all about 👌
@AmatureAstronomer
@AmatureAstronomer 3 ай бұрын
Nice explanations.
@1marktanderson
@1marktanderson 2 жыл бұрын
Great points to consider concerning equipment prices. You can have just as much fun in a Mazda Miata on a twisty road as in a Ferrari. It’s all about the journey. Have learned a lot watching your videos. Thanks. 😎
@lvl76darkelf
@lvl76darkelf 2 жыл бұрын
Love you! Thank you so much!
@Astronurd
@Astronurd Жыл бұрын
There’s also different types of ED glass which is a measure of the quality of diffraction control. The field flattener for the 80ED will fit your telescope
@epickcrom5606
@epickcrom5606 2 жыл бұрын
Thank you Larry for another interesting video! I have a reflecting telescope and might consider a small refractor in the future. Happy New Year!
@Nottsboy24
@Nottsboy24 2 жыл бұрын
Nice telescope for beginners 👌 all brands of telescopes are good for first timers not just Dobsonian telescopes 🔭 popular brand is Celestron 👌
@ericemanuelson5128
@ericemanuelson5128 2 жыл бұрын
Great video! I don't mind the false color too much I have used a yellow filter with a 90mm refractor that had issues and that helped I've since sold that telescope. I have looked into a Baader semi APO filter for use on my other refractors but it hasn't been in stock. I did spy the powerseeker behind you that was my first telescope in 2018.
@oldgazer7200
@oldgazer7200 2 жыл бұрын
Thank you for the comment. So many things not in stock or on back order these days! Took me 4 moths to get a Baader eyepiece.I‘ve had that EQ 127 for awhile now. Been meaning to give it to my grandkids but they seem to be interested in things other than astronomy. So I’ll hang onto it for a while. Not a great scope but I’ve enjoyed viewing and imaging the moon
@jons2447
@jons2447 2 жыл бұрын
Thank you, Larry! I just subbed & I've only seen a few of your videos. But if I may I'd like to offer some advice for your consideration. I'm 66 & a southron so I think I can offer the benefit of my training. You mentioned your research for this video & that indicates your genuine desire to help. In that vein I suggest you prepare an outline. In training for public speaking I was taught to use an outline. As a beginner I was told to wrote out my assignment to help commit it to memory. Then, to simplify the presentation I was taught to use an outline. The next advancement was to strive for concision in speech, to be brief. Our training put limits on how much time we had. So we were taught to limit how many points to address. I hope these tips help you as they have me. Have a GREAT day, Neighbor!
@Nottsboy24
@Nottsboy24 2 жыл бұрын
Astronomy Show here in the UK - kzfaq.info/get/bejne/Zq-qm7honNjdZoE.html
@jakubw.2779
@jakubw.2779 2 жыл бұрын
I clicked this video because of Orion telescope. I've got myself an Orion GoScope III 70mm telescope with tripod, 20mm and 9mm eyepieces, search scope and a this angle thingy (sorry i'm not English) for about a 100 dollars (430PLN) for christmas. But I am actual beginner So i was interested in the tips too. I was not dissapointed. The part about lenses was super informative and interesting and cleared alot of my questions about images i saw through my telescope. Thank you very much.
@oldgazer7200
@oldgazer7200 2 жыл бұрын
Thanks for your comment! I’m sure you’re going to have great fun with your telescope.
@lersusallarhand5831
@lersusallarhand5831 2 жыл бұрын
Thank you very much for yet another interesting and information filled video! I am a reflector user but every aspect of amateur astronomy is fascinating for me :). Greetings from (unfortunately very cloudy) Nuremberg.
@oldgazer7200
@oldgazer7200 2 жыл бұрын
Thanks for the reply. Very cloudy here also. Snow predicted for tomorrow.
@MountainFisher
@MountainFisher 2 жыл бұрын
I have used my 60mm spotting scope for a long time, but it needs a diagonal and it's not made for them.
@Nottsboy24
@Nottsboy24 2 жыл бұрын
Astronomy Show here in the UK - kzfaq.info/get/bejne/Zq-qm7honNjdZoE.html
@kendalsmucker4899
@kendalsmucker4899 4 ай бұрын
First time I have ever heard someone put a number to the “astronomer’s curse”.
@lornaz1975
@lornaz1975 2 жыл бұрын
What mount are you going to use for it? And also, just wondering, it seems that the old 70mm's OTA is movable from seeing how you handle it. Can the 70mm scope be used manually? I assume its the electronics that have failed.
@oldgazer7200
@oldgazer7200 2 жыл бұрын
For now I’ll be using my Go-To alt-az mount. Yeah my 70 mm is a Meade ETX 70 that my family bought me over 20 years ago. You’re right, the electronics have failed, but that’s not all. The OTA is molded plastic made to fit the mount it came with and the mount has developed a serious crack on one of the arms right where the OTA fits . I could probably do a little DIY work - maybe try to fix the crack or add some kind of mounting plate and/or rings so I could use another mount. But I’ve never been very good at DIY stuff, so for now I’ll just spend some time trying out the new 80 mm.
@lornaz1975
@lornaz1975 2 жыл бұрын
@@oldgazer7200 80 mm is a bigger aperture so you will be better off. Hope you get to use it soon!
@PafMedic
@PafMedic 2 жыл бұрын
I Would Have Been Sad Had A Got A Dob Instead Of My 6se..Santa Knows
@astronomynotebook
@astronomynotebook 2 жыл бұрын
…or a 6 or 8 inch Maksutov Newtonian…😊❤️🔭
@oldgazer7200
@oldgazer7200 2 жыл бұрын
I could go for that!
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