Thank you, Ryan and Tom for your responses. As for the airplane windows, - yes, indeed, - they are birefringent, - and that's the reason for not using polarizer with them.
Ryan, I haven't noticed any moire on my screen. I was watching for that while choosing the level of the USM. Tue, 18 Apr 2006 17:01:56 -0700 Tom C wrote: > I'm sure the shots taken from a small hired plane with an open > window would be far superior to those taken from a commercial > airliner. But most of don't have that kind of cash laying around. If one can afford hiring (or even buying) one, - it doesn't even need to be that small, as long as you can open a window or a door in mid-air. :-) I wish I could. Tom, when you decide to hire a plane, please stop by and take me with you, - I'll show you the best places and angles to photograph. :-) Igor
