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Originally Posted by janoskiss
John, the specs I was reading specify over 19mm eye relief.  |
Steve,
6.8mm of eye-relief didnt sound right to me but here's where I got it from
https://www.bintelshop.com.au/Product.aspx?ID=6979
You would expect a 32mm plossl to preserve about 70% to 75% of its Focal Length as Eye-relief ie. about 20mm to 22mm. However these are far from a standard plossl, with a 60 deg AFOV. Some eyepiece designs, notably modified Konigs and Erfles (and a few others), have short eye-relief combined with a medium wide field, so I wasn't sure.
CS-John B