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20mm Nagler.
Same FOV as the 24 Pan. but 1/3 higher magnification.
There are those that rave about the 22 Nagler (as well as the 17) and optically they are great. However, I find the "instajust" mechanism on the T4s a pain and the eye position to restrictive.
The 20mm Pentax gets rave reviews, and I see you have the 10mm. I find they have too MUCH eye relief and again, eye position seems too critical.
The Vixen LVW 22 is a wonderful EP but doesn't seem to be regularly stocked anywhere.
But "gun to head" I'd pick the 20mm Nagler. No blackouts, 4.4mm exit pupil, sharp over about 90%, excellent contrast and pretty light for an EP this size.
You might also consider a 13 or 16mm Nagler and/ or a 19mm Panoptic. I've just been out with 13N and 19P and for globs and smaller nebulae - what a combination!
Just my $.02
Peter
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