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Thread: High power ep for ES ED80 triplet

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    Default High power ep for ES ED80 triplet



    As noted in a previous post, I'm going to go for the ES 80mm, either the ED80 or the FCD100 80. I have all the eps I need for wide field views, but I'd like to get one for higher mag for that scope, maybe a 3.5mm. I have mostly TVs, so I've been looking at Delos, Delite or Nagler. Don't want to spend the money for Ethos. Any recommendations, either TV or other brand?
    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: High power ep for ES ED80 triplet

    Well seeing you have both a zoom and barlow, I would first try the combination to determine the highest usable magnification with your scope and then go from there. I actually did this with my zoom and barlow before ever buying my higher power separate lenses.

    Abb
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    Default Re: High power ep for ES ED80 triplet

    With the f/6 focal length you would not want to go lower than a 3mm eyepiece as your exit pupil will be less than 0.5mm and floaters will be very prominent. The view will also be considerably dimmer.
    The 3.5mm will probably be too much for using most nights. I would go with a good barlow if you want to get to these magnifications to avoid spending money on an eyepiece that rarely gets used.
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    Default Re: High power ep for ES ED80 triplet

    Hi Gene,

    Your signature says you have an Evo 9.25. My question is why do you need the ES 80 to deliver high mags when you could just use the Evo 9.25?

    Cheers,
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    Default Re: High power ep for ES ED80 triplet

    What AbbN and Gabby76 said.........

    jaetea, just my guess but on nights of poorer seeing I'll use a smaller aperture scope since resolution is atmosphere limited, but I may still want to have higher magnification. Bad seeing in a 9 inch could be good seeing in a 3-4 inch scope.
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    Default Re: High power ep for ES ED80 triplet

    Hi Gene,

    I love my 3-6mm Nagler zoom... Works really well with my TV76: same fl as the ES80. I don't often go to the 3mm end, but despite the small exit pupil it still gives crisp views, and I haven't been bothered with floaties too much. It really allows you to adjust for the conditions.
    It is an expensive eyepiece, but you get 4 for one, and I got mine second hand...

    All the best,

    Dean

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    Default Re: High power ep for ES ED80 triplet

    Quote Originally Posted by DeanD View Post
    Hi Gene,

    I love my 3-6mm Nagler zoom... Works really well with my TV76: same fl as the ES80. I don't often go to the 3mm end, but despite the small exit pupil it still gives crisp views, and I haven't been bothered with floaties too much. It really allows you to adjust for the conditions.
    It is an expensive eyepiece, but you get 4 for one, and I got mine second hand...

    All the best,

    Dean
    I am also using the Nagler zoom for the maximum magnifications, and on the very small planetry nebulae I eventually go down to f=3mm.
    An alternative would be to take the BCO f=6mm plus the Baader Q triplet Barlow - I will test this combo on the next possible opportunity.

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    Default Re: High power ep for ES ED80 triplet

    I have the es80mm and I use a 7mm xw pentax with a 2x tv barlow for 137x. I have old eyes and it gives me very clear views. Floaters do not seem to be a problem for me.
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    Default Re: High power ep for ES ED80 triplet

    I don't have a barlow, but maybe that's the best idea. I'm going to NEAF so maybe they'll have a deal on barlows. I asked the question in part because of NEAF, since there may be sales on eps also. Maybe a Powermate would be good with my Ethos 6mm and that's all i need. I only want to have the higher power at times when seeing might make the triplet better than the sct.
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    Default Re: High power ep for ES ED80 triplet

    Read up on the differences between a barlow and powermate, the powermate is more designed for AP but does work with some EPs well though not all.
    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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