Jeff Hopkins wrote: > I tried various red filters, a moon filter and no filter. Surprising, > at times the moon filter seemed to work best. Other times the red > seemed to help a bit and still others more could be seen with no > filter. I spent a couple of hours on this and don't know why the > effect. It may just be me. I have yet to get a decent digital image. > Mars is not as easy an object as one might think. Totally > unlike Jupiter and Saturn. I've experimented with stacking the 23A and Moon filters, as you suggested, several nights over the last week. When the seeing settles, this combination has produced some nice, contrasty views. Thanks for the tip. Regards, Bill Ferris Flagstaff -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.