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Thread: What is the best 9mm - 10mm eyepiece in a 2" size?

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    Default What is the best 9mm - 10mm eyepiece in a 2" size?



    I was originally looking at the Tele Vue 10mm Ethos, but it is really just a 1.25 barrel size with a 2" adapter. As such, you don't get any benefit from the 2" barrel. Since I just converted to a 2" set up, I would really like to take advantage of that.

    I currently have an Explore Scientific 40mm, a 19mm Celestron Luminous, and wanted to get a very nice eyepiece around a 9 - 10mm size for magnification of around 300x. I have looked at the Explore Scientific 9mm 100 degree eyepiece but it indicates the eye relief is only 12mm which seems a bit shallow.

    Would love to get some insight and opinions. Many thanks.
    Scope: 11" Celestron CPC 1100 GPS (XLT) with StarSense Autoalign
    Eye Pieces: 2" Explore Scientific 40mm 68 degree, 2" Celestron Luminos 19mm, 1.25” Tele Vue 10mm Delos, Tele Vue 7mm Delite
    Accessories: Brunello, Reidel Vinum XL glass, Stilton Blue

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    Default Re: What is the best 9mm - 10mm eyepiece in a 2" size?

    With a f/10 telescope you are wasting money buying 2" high powered eyepieces.
    The only need for 2" is when the field stop gets to large for the 1.25" format.
    Also something like an Ethos will have a nice view but at f/10 is wasted for the incremental % you get for the extra money as they are designed more for fast telescopes.
    Something like this would be ideal in your telescope and has 20mm of eye relief: https://optcorp.com/collections/vixe...eyepiece-37207
    Leveye likes this.
    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"
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    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 eyepiece/ camera. - Gabrielle
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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: What is the best 9mm - 10mm eyepiece in a 2" size?

    Quote Originally Posted by Gabby76 View Post
    With a f/10 telescope you are wasting money buying 2" high powered eyepieces.
    The only need for 2" is when the field stop gets to large for the 1.25" format.
    Also something like an Ethos will have a nice view but at f/10 is wasted for the incremental % you get for the extra money as they are designed more for fast telescopes.
    Something like this would be ideal in your telescope and has 20mm of eye relief: https://optcorp.com/collections/vixe...eyepiece-37207
    If I go back to the 1.25 at this size, what is your opinion of the Meade Series 5000 1.25" Mega Wide Angle 10mm Eyepiece as it has a 100 degree Apparent Field of View? It also has a 20mm eye relief.
    Scope: 11" Celestron CPC 1100 GPS (XLT) with StarSense Autoalign
    Eye Pieces: 2" Explore Scientific 40mm 68 degree, 2" Celestron Luminos 19mm, 1.25” Tele Vue 10mm Delos, Tele Vue 7mm Delite
    Accessories: Brunello, Reidel Vinum XL glass, Stilton Blue

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    Default Re: What is the best 9mm - 10mm eyepiece in a 2" size?

    I have not tried this eyepiece before so cannot comment.
    Hopefully someone else has used it and can tell you about it.
    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"
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    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 eyepiece/ camera. - Gabrielle
    Ya gotta keep this Apo/
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    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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    Benintendi (04-01-2018)

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    Default Re: What is the best 9mm - 10mm eyepiece in a 2" size?

    I have read a few reviews and here is what I have been able to discover.
    Eye relief is as stated, FOV is not actually 100° some say closer to 85° and it noticable suffers from EOFB (edge of field brightening)
    The on axis view is very good but deteriorates after about 80% to edge.

    There seems to be a real mix of how people like it even amongst reviewers I consider very reliable.
    Leveye likes this.
    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"
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    Amici prism, 2" Stellarvue Dielectric, 2" TeleVue Everbrite Eyepieces: A-Z

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    The weakest link in the optical chain is the large nut located directly behind the eyepiece/ camera. - Gabrielle
    Ya gotta keep this Apo/
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    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: What is the best 9mm - 10mm eyepiece in a 2" size?

    I love all my old Meade eyepieces from the 80's. The 1.25 UWA "smoothies" are excellent. Grab em when they come up.
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    Default Re: What is the best 9mm - 10mm eyepiece in a 2" size?

    Quote Originally Posted by Gabby76 View Post
    I have read a few reviews and here is what I have been able to discover.
    Eye relief is as stated, FOV is not actually 100° some say closer to 85° and it noticable suffers from EOFB (edge of field brightening)
    The on axis view is very good but deteriorates after about 80% to edge.

    There seems to be a real mix of how people like it even amongst reviewers I consider very reliable.
    Gabby76, many thanks for the follow up on this. Much appreciated.
    Scope: 11" Celestron CPC 1100 GPS (XLT) with StarSense Autoalign
    Eye Pieces: 2" Explore Scientific 40mm 68 degree, 2" Celestron Luminos 19mm, 1.25” Tele Vue 10mm Delos, Tele Vue 7mm Delite
    Accessories: Brunello, Reidel Vinum XL glass, Stilton Blue

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    Default Re: What is the best 9mm - 10mm eyepiece in a 2" size?

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    Default Re: What is the best 9mm - 10mm eyepiece in a 2" size?

    I have the 9mm Explore Scientific nitrogen purged lens. I *think* it might be 100 FOV, but that's not why I bought it. It is my goto lens for medium power (I have an F4.9 scope). But where I really like it is in it's frost-free ability. Other lenses I have will frost up but I've not experienced that with the 9mm. By way of disclaimer, I liked it so much I also bought the 4.7mm. I don't use the 4.7mm as much because I need really good skies, but it does a great job on Jupiter and Saturn. A word of caution though - the 9mm is *heavy*. I have to be very careful on my alt/az mount when the alt angle gets near horizontal. I use 1 pound weights to counter balance the scope so the clutch doesn't give way. (I sometimes have to add 3 pounds).
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    Default Re: What is the best 9mm - 10mm eyepiece in a 2" size?

    Looking at your signature you already got good quality 10mm EP with plenty of eye relief - TV Delos. I don't believe you can improve on that.
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