16 mm nagler ,, eye relief is tight , to tight for me over time but its very sharp all over the view and very compact... reminds me of a slightly
argumentative pan 24 in that its a gem of a small eyepiece with just that tight eye relief issue making you twice think it .
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Aside a zeis ortho 6 , 22 t4, and a few orthos I've bought twice, maybe a pentax 14mm one day soon I'm only tracking at 20 Don ,, good to see others problems in perspective