|
Another option is the Pentax XF 8.5mm. Mine shows a small amount of field curvature on its own but this disappears when used with a Barlow. So for the next Jupiter opposition I'm hoping this will be a good combination in my scopes. The XF's 60º AFOV will be welcome over the Plossl's 50º since my scopes are also undriven. The XF also has 18mm of eye relief.
|