Quote:
Originally Posted by ZeroID
Make an aperture mask ....reduce the incoming light first. My 80mm has a front lens cover, with another smaller hole with its own lens cover for bright objects. I made a thick black card cover for the newt. Offset hole of course and place it so the light path is not partially obstructed by either the vanes or the focusser tube intrusion.
THEN a 25% or 13% filter..
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Reducing aperture will reduce resolution. Any small craters will simply disappear. Same happens with a variable polarizing filter to some extent at least the one I have and never use as small craters disappear with it too. (Meade model designed for SCT).
I feel Moon filters are not required as your eyes will adjust. If you really want to reduce the brightness try a binoviewer since it will split the beam and also makes for very comfortable viewing that the brain interprets as stereo.