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Thread: Filling out my ep collection for Evolution 9.25

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    Default Filling out my ep collection for Evolution 9.25



    I've been mulling over the idea of filling out my ep range for my Evolution 9.25. I have the following now in my 2 inch collection:
    TV 55 plossl 43x
    Panoptic 27 87x
    ES 100-20 117x
    Ethos 13 180x
    Hyperion 8-24 zoom (8mm is 293x)

    I thought of filling in the 43-87x range with something like an ES 34mm (69x) or Panoptic 35 (67x). At the high mag end for planetary, I thought maybe an ES 100-5.5mm (about 470x) or an Ethos 6mm or 8mm (391x or 293x). Or would I be better off with a Barlow or Powermate for the Ethos 13?

    Any opinions about the specific brand choices or the mag choices or telling me I have equipment fever and should seek professional intervention will be welcome.

    Gene
    Evolution 9.25. Stellarvue SVR102T Raptor/3”FT focuser, 0.8 focal reducer, ES ED80. EPs. TV 55 Plossl, Panoptic 41, 35 and 27, ES 100 20, Nagler 17 Type 4, APM 18 UFF (2), Ethos 13 & 6, Delite 11 (2), Nagler 9 (2), Morpheus 6.5 (2), Lunt/APM 5mm HDC XWA (2), Delos 3.5, Nagler 2.5,Baader 8-24 Zoom, HP Quartz 2" diag., Celestron OIII, 13% ND,UHC 2" filters, Starsense. Lunt LS60THa/B1200FTPT Double Stack. Binos: APM 100-90 ED, Canon 10x42 IS-L, Atlas 8x42 and 10x50, Oberwerk 6.5x32, Celestron 15x70,Baader Solar bino filters, Lunt 8x32 Solar bino Mounts: Evolution, Ioptron ieq45 Pro Dual AZ w/Polemaster, Manfrotto 475B w/ Nitrotech N12, Meade LX70 GEM, ES Twilight I, Benro monopod, Canon EOS Rebel T7i

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    Default Re: Filling out my ep collection for Evolution 9.25

    It all depends on what you typically observe. If planetary is the goal, I would drift away from the zoom and fill in the high-mag range with a precision Japanese Ortho for detail work. Since you have a tracking mount, the need for heavy wide fields with lots of glass is not so necessary. Go 3-element lean and mean.

    The only thing, though, about these kinds of eyepieces, is the FOV is tight and the eye relief is too uncomfortable for many folks. I kind of started with these types of optics, so I got used to them long ago. It just takes practice.

    Here's some good Ortho suggestions:

    1.25" Telescope Eyepieces | AgenaAstro.com - Kasai Trading Co. - Astro Hutech

    Or, these Star Splitter Series from Siebert Optics are also excellent:

    Siebert Optics - Eyepieces - 1.25"

    To me, it looks like you already have a nice selection, so maybe there's some equipment fever going on, but, who around here doesn't have that?

    Good luck and enjoy the hunt!
    Jerry
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    Default Re: Filling out my ep collection for Evolution 9.25

    ES 82 degrees EPs perform extremely well on planets in my 8" SCT. With excellent seeing I push routinely mag to 432x with 4.7mm with great level of details. ES 82 6.7 mm would be better choice for your longer FL.

    I read posts that ES 82 beat ES 100 on focus sharpness. Would make sense to me, but can't confirm since I don't have any ES 100 EPs.
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    Default Re: Filling out my ep collection for Evolution 9.25

    Are you looking to strictly stick to 2" EPs or are 1.25" EPs also an option. I'm assuming based on your post that you're ok with spending $ as long as you get good quality. For higher power on planets I'd suggest the 10mm Delos for 235x. Based on your location in New York you won't often be able to use much more than that due to the seeing conditions. Magnifications of over 400x for us Great Lakes and Northeast dwellers are typically only useful for high power lunar work, and even then only sometimes. The 8mm Delos would give you 293x and be useful on nights of above average seeing. If you really want a very high power option the ES82 6.7mm would give you 350x and be useful much more often than the over 400x offered by the 5.5mm. Just realize that anything over 300x won't be usable on much other than the moon most nights, although a few weeks ago I managed to push 311x on Jupiter in my C11 and get excellent results. BTW, the Delos are fantastic EPs, I own the 17.3mm and it out performs every other EP I have, plus for the price of one Ethos you could get two Delos.
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    Default Re: Filling out my ep collection for Evolution 9.25

    Thanks, Wingsfan. Yes, I think I want to stick with 2" eps. After investing in 2" diagonal and moving to matching eps, it seems like going backwards to shift back to 1.25s. Maybe I'm wrong about that. I appreciate the advice about the seeing conditions in my area. But I guess one can always hope.

    Gene
    Evolution 9.25. Stellarvue SVR102T Raptor/3”FT focuser, 0.8 focal reducer, ES ED80. EPs. TV 55 Plossl, Panoptic 41, 35 and 27, ES 100 20, Nagler 17 Type 4, APM 18 UFF (2), Ethos 13 & 6, Delite 11 (2), Nagler 9 (2), Morpheus 6.5 (2), Lunt/APM 5mm HDC XWA (2), Delos 3.5, Nagler 2.5,Baader 8-24 Zoom, HP Quartz 2" diag., Celestron OIII, 13% ND,UHC 2" filters, Starsense. Lunt LS60THa/B1200FTPT Double Stack. Binos: APM 100-90 ED, Canon 10x42 IS-L, Atlas 8x42 and 10x50, Oberwerk 6.5x32, Celestron 15x70,Baader Solar bino filters, Lunt 8x32 Solar bino Mounts: Evolution, Ioptron ieq45 Pro Dual AZ w/Polemaster, Manfrotto 475B w/ Nitrotech N12, Meade LX70 GEM, ES Twilight I, Benro monopod, Canon EOS Rebel T7i

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    Default Re: Filling out my ep collection for Evolution 9.25

    Even with premium eyepieces under about 18mm they will all be 1.25. Even those with dual barrels are really 1.25"s. High magnification I would go Delos 10mm or 8mm max and for wide I love my Panoptic 35 (I did add the extended eyecup to help eye placement).
    Bruce
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    (Nagler 3-6, 7,13,22, Panoptic 35,41, Delos 6,14, Powermate 2"x2), Pentax 10 Televue 8 Plossl
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