[Starkler (Geoff)]

Im pondering as to whether I should purchase a filter or two in preparation for the upcomming Mars oppostion. I usually prefer my views au-naturale, but if significant contrast gains can be had on Mars, I might invest in a filter or two.

What coloured filter would be the best bet for enhancing details of the Martian surface?

Do cheap filters as sold by most dealers rob the viewer of detail compared to higher priced alternatives? Who sells quality coloured filters?

Thanks.