Stacking Filters

[Tailgunner]

Yep Polerizer filters make a good back-up ND filter (in fact the variable ND filters are, I think, simply an assemble of polerizer filters together) - or you can use them with ND for increased light stopping.

The point on UV light I read a fairly long while back, info stuck but source didn't I'm afraid. Though at a basic point of logic UV light increases the higher up you go and cameras are made for average conditions only. If you're up that high yourself I'd say break out a UV filter and give it a test and see what the real world result for yourself is (the difference might be marginal - esp after editing).

Thanks, I'm going to dust off my UV filter and give it a try next time I plan on higher elevation shots.

 

[Jay Vee]

Something that hasn't been mentioned yet is that stacking filters may cause heavy vignetting. Awhile back I tried a UV and CPL just to see what it does and there was heavy vignetting. It's almost like looking through a telescope.