[AstralTraveller (David)]

Originally Posted by TrevorW

The other option is to mask the aperture of your scope thereby reducing the amount of light it gathers it will help to improve the image.

Cheers

I don't understand that idea. The resolving power of a scope is directly proportional to its aperture, so masking the scope will decrease the resolution. It is also no use 'losing' aperture by increasing the size of the secondary obstruction as that increases diffraction and so reduces contrast. The only way I can see to reduce the amount of light without losing performance is to use a filter.

cheers,
Dave