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Thread: Article: What Astronomy Eyepieces should I get for my Telescope?

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    Default Re: Article: What Astronomy Eyepieces should I get for my Telescope?



    Thanx Bryan, I had actually read this article a while back, but at that time it was one of the pieces of information that I could not absorb. Call it old age, I am someone that has to read and reread these days, lol. johnnyb
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    johnnyb - Orion XT10G, ES 62 degree 9mm, ES 82 degree 18mm, Celestron Skymaster 20x80 binocs, Celestron Skymaster 12x60 binocs, Oberwerk 10x60 Marine Binocs, Simmons 10x50 binocs, Vestil CPRO 600, Nikon D90 DSLR with an assortment of lenses and a wide plethora of questions.

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    Default Re: Article: What Astronomy Eyepieces should I get for my Telescope?

    Great information. Thank you
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    Default Re: Article: What Astronomy Eyepieces should I get for my Telescope?

    Your welcome Mr. Rustic and welcome to the forums
    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
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    The weakest link in the optical chain is the large nut located directly behind the
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    Default Re: Article: What Astronomy Eyepieces should I get for my Telescope?

    Quote Originally Posted by Gabby76 View Post
    Your welcome Mr. Rustic and welcome to the forums
    Thanks Gabby,
    Just recently bought an 8 inch dobsonian and have come across this site looking for information but couldn't view it without signing up. So thought it was best to register. 😉

    Happy gazing.
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    Default Re: Article: What Astronomy Eyepieces should I get for my Telescope?

    A lot of good information and helpful people, feel free to introduce yourself in the welcome forums
    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
    Mounts: Celestron SLT w/ pier mod & EQ-3 tripod, Celestron hypertuned CG-5 w/ tracking motor & Argo Navis, Manfrotto 028B w/ Stellarvue M2C, Manfrotto 055PRO w/ 128RC, TAL-1 HD EQ, Vixen SXP w/ HAL-130 SXG & half pier
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    The weakest link in the optical chain is the large nut located directly behind the
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    / camera. - Gabrielle

    Ya gotta keep this Apo/
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    thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)

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    Default Re: Article: What Astronomy Eyepieces should I get for my Telescope?

    Thanks for a really useful and informative article.This answers alot of questions that I have been wondering about
    Gabby76 likes this.

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    Default Re: Article: What Astronomy Eyepieces should I get for my Telescope?

    Thanks for a great article Gabby. Could I ask a few quick questions?
    1. What are your thoughts on zoom eyepieces? I have found fiddling around in the cold and dark to change from a 25mm (to locate an object in the fov) to a 10mm (to observe more closely) very awkward indeed. Maybe just because I'm new to this....
    2. I seem to remember reading somewhere that using a barlow and longer focal length ep is better than a single shorter fl ep as regards the effects from "floaters" etc in the observer's own optics (and I have quite a few of these annoying little blighters!!!!). Any thoughts?
    3. Also read somewhere that eyepiece quality is less important for a Mak Cass scope with it's relatively long focal length (mine is about f12, fl 1500mm). Any truth in this? And any comments re the underlying optical reason. Maybe the light rays converging at less an angle so the ep has less work to do?
    Thank again, Leslie
    Leslie

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    Default Re: Article: What Astronomy Eyepieces should I get for my Telescope?

    Hello Leslie,
    I have had the Vixen LV zoom in the past and used it quite a bit but found over time I preferred fixed eyepieces with specific FOV. The zoom was used for solar observing after that where it did a fine job.
    Many people like the zoom and they are an excellent way to fill out an eyepiece set when starting out or if you enjoy using a binoviewer.
    They can be a bit awkward at first or depending on the telescope you use but practice will help out with its use.

    Some people have a hard time using eyepieces with short eye relief due to wearing glasses or just not liking to have their eye that close to the eyepiece.
    The smaller the focal length of the eyepiece the smaller the exit pupil. Using a barlow lets you preserve the eye relief of the longer focal length eyepiece but does not fix the floater issue.
    For example, a 10mm eyepiece and 2x barlow gives you a eyepiece focal length of 5mm but with the eye relief of a 10mm.
    All other parameters of the eyepiece are of a 5mm though such as magnification, exit pupil and TFOV.

    Longer focal length telescopes do have the advantage of being able to use simpler design eyepieces or a better way to say it is they do not require highly edge corrected eyepieces (or expensive correctors) to get excellent views like a fast Newtonian needs.
    You idea of the converging light rays works well enough
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    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
    Mounts: Celestron SLT w/ pier mod & EQ-3 tripod, Celestron hypertuned CG-5 w/ tracking motor & Argo Navis, Manfrotto 028B w/ Stellarvue M2C, Manfrotto 055PRO w/ 128RC, TAL-1 HD EQ, Vixen SXP w/ HAL-130 SXG & half pier
    Diagonals: 2" Astro-Physics MaxBright, 2" Zeiss/ Baader prism, 2" Baader Herschel Wedge (Photo Version), 2"
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Amici prism, 2" Stellarvue Dielectric, 2" TeleVue Everbrite
    Eyepieces: A-Z

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    The weakest link in the optical chain is the large nut located directly behind the
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    / camera. - Gabrielle

    Ya gotta keep this Apo/
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    thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)

    Refractors kick arse precisely because they don't hide behind excuses. That is, they have no obstructions to hide behind. - Jon Isaacs (CN)

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    Default Re: Article: What Astronomy Eyepieces should I get for my Telescope?

    Thanks so much for the detailed reply. I think I will go for a zoom eyepiece ....and a Barlow for the eye relief.
    Was afraid the story about Barlows and floaters was too good to be true!!!!!!
    Cheers Leslie
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    Leslie

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    Default Re: Article: What Astronomy Eyepieces should I get for my Telescope?

    Celestron Firstscope came with Huygens 20mm eyepiece. Same with Kellner 10 mm eyepiece. On heavy light polluted sky i could barely see any stars with it. Then i switch to Celestron Omni 32mm and i could see upto 6.2 magnitude stars.

 

 
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