Consider also the ability of your mount to track. If it is less than optimal a narrow field of view means moving the scope quite frequently (as you are operating at very high power). Orthos certainly would be sharp and a good choice but they do have a narrow field of view. Also eye relief and use with eyeglasses is a consideration with any eyepiece (although the UO orthos are pretty good from memory). Eyepieces can range from quite low eye relief (eg. my Nagler type I 4.8mm) which is around 6mm to up to 20mm which is much better really.
So its all a balance. Some of the vixen LVs get reasonable reviews too and the LVWs/stratus/hyperions are good too but probably a bit over the $200 (and quite heavy too).
To be honest I love the sharpness of my 4.8mm type 1 Nagler. I think it is even better than my LVW 3.5 (marginally). However you really need to use the 4.8mm barlowed or the eye relief sends you nutty (It wasnt too bad 15 yrs ago - my eyes are ageing). I'd imagine the more recent Nagler 4.8mm type 6 is a classic but you do pay a lot more for it.
Cheers
David
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