|
The pentax XF12mm is a 'try before you buy' eyepiece due to field curvature - the XF8.5 doesn't have that problem.
After using the 42mm as a finder, I think you should jump to between 13mm to 17mm - this gives 70x to 90x mag which is good for DSO's and almost always useable(depending on your local conditions). The 13 or 17 Hyperion/Stratus eyepieces are a cheaper but decent option.
Then you could go to an XF8.5mm (140x).
|