For those who might be interested the design of Televue Radians don't suffer from the same field curvature problems which plague the Pentax eyepieces over 10mm FL such as the XW14, XW20 and Pentax XF12mm
So - if you are after an EP under $200, over 10mm focal length, has at least 60' fov, has sharp on axis performance, no field curvature design flaws, uses lanthanum glass and most importantly has 20mm ER - then this is the pick
