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Eyepieces with ~20mm eye relief should be comfortable.
Examples include Vixen LV6mm (old but still excellent, secondhand around $100), LVW 5mm, Takahashi LE, Televue Radian... Some were also rebadged eg the Orion/Celestron copies of the vixen ones, Orion Stratus and Baader Hyperions....
Plossls and orthoscopic have relatively little eye relief. Worst are the monocentrics, almost no eyerelief, meaning you have to be brave enough to put your eye in contact with the lens. I once had a 4mm ortho like that and froze my eye to it in a cold winter night, very painful.
Last edited by Wavytone; 25-06-2013 at 02:19 PM.
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