|
Just to clarify:
Yes, a semi-apo is generally for refractors. It is a combination of a moon and skyglow (light pollution component and reportedly good for planets) and the fringe killer (more useful for the refractor). It is very high transmission. If you have a reflector there would be little need for the fringe killer component [although the semi-apo does give a fairly neutral sort of a filter in terms of changing the hue of objects (eg planets and moon)] so the moon and skyglow would probably suffice. There are other types too but I havent tried them so I can't comment.
|