The Pentax XW series occulars are fantastically good. Super coatings, wide well correted field, good colour correction across the field, beautifully sharp. A wonderful eyepiece.
I really wanted them to work in my binoviewer because of their optical excellence. Unfortunately they are physically too large - my nose got in the way. I could not use them in a binoviewer.
Some people do use them in binoviewers, sometimes by removing the eyecups, which in the XW series screw off. However, why buy a superior occular only t remove the eyecup and subject your view to stray light.
I sold my 14mm Pentax XW's, and bought a pair of Televue 14mm Radians. Almost as good, and they work well in a binoviewer. I would have been deliriously happy with the optical properties of the Radians if I hadn't already had a pair of XW's, as it is I wish for an occular with the physical size of the Radians, and the optics of a Pentax XW.
jean bruno said:
Also, I want to use them in a binoviewer.
