Quote:
Originally Posted by astro744
The 16mm T5 Nagler is a fine eyepiece in both mono and bino and the volcano top form factor (same as 19mm Panoptic) makes the shorter eye relief a non-issue for many (not for eye glass wearers though without sacrificing apparent field). I understand there are some that still prefer a longer eye relief, and this is a personal preference.
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Being an eyeglass wearer with "some" astigmatism I find the short eye relief to be a non issue with narrow AFOV eyepieces like orthoscopics, as I take my glasses off and the AFOV is narrow enough that my astigmatism doesn't kick in. It's also less noticeable with the shorter focal lengths I use with orthoscopics, due to the smaller exit pupil. One of my observing buddies has a 16mm Nagler T5, which he absolutely loves, but I just cannot use. The 10mm of eye relief (about 6 to 8mm useable) combined with the wider AFOV, just doesn't work for me. I can appreciate what a high quality eyepiece it is, but it's just not for me. I'll take the 17mm Nagler T4 in a paracorr every day of the week. Or better still, the 17mm Nikon NAV HW.
Cheers
John B