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Old 13-08-2015, 08:51 PM
ausastronomer (John Bambury)
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Join Date: Mar 2005
Location: Shoalhaven Heads, NSW
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Quote:
Originally Posted by N1 View Post
Bill, while I quite like your review and would consider it valuable to anyone considering these EPs, I respectfully disagree with your chair/stool analogy. I can't see how ER and AFOV could possibly be of the same importance as optical performance. Rather, I'd class the latter as the legs and seat of the chair, with eye relief and apparent field of view corresponding to things like armrests, padding, heating coils in the seat, social media connectivity of the seat and so on - you get the idea. Omit optical performance - the legs and the seat - and the whole thing is all but useless. The same is not true for the other two things.
Hi Mirko,

This is the exact point that Bill is making, that the whole thing is highly subjective and entirely dependant on end user preferences. To some, AFOV is the most important. To others on axis performance and form factor is paramount. To others it is comfort and AFOV, to others its off axis performance. There's no right answer. To me its an eyepiece that offers the best balance of most of those things. From someone that owns TV Ethos, TV Delos, TV Nagler T4, TV Radian, TV Panoptic, Pentax XW, Pentax XF, Pentax XO and UO HD orthos, the PENTAX XW's come closest to satisfying me as a closest to "keep me happy" eyepiece. Others will choose other eyepieces because some criteria which are important to me are less important to them and vice versa.

Cheers
John B
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