Will someone who owns a Pentax XW 7 though 20 mm eyepiece please measure the eyecup opening diameter for me - the opening in the screw-on adjustable eyecup where you put your eye to view. I cannot find that dimension online anywhere, don't know anyone who owns one, and there are no telescope shops in my area.
I have a C8 SCT and use Delos and Pentax XL eyepieces for 20mm and lower. Reasons are optics quality and 20mm eye relief with the adjustable eyecup positioning. I find the Pentax XLs to be excellent eyepieces, but with one big negative -- the eyecup opening at the lens is quite small (only about 28mm / 1-1/8") compared to the much larger diameter opening of the Delos. I prefer the Delos in this respect, and it's strictly a comfort thing for my personal viewing -- the older Pentax XL eyepieces have great optics and function.
I want to know if the newer 1-1/4 Pentax XW eyepieces have a larger opening in the eyecup than the older XLs since they changed from 65 degrees to 70 degrees AFOV. I plan to replace the XLs and would prefer to keep a mix of Pentax and Delos if the XWs have a larger eyecup opening.
Thanks and I wish you all clear dark skies these last weeks before Daylight Savings Time makes us stay out an hour later.