Not sure if anyone has tried this - I've only done this for fun on my Coolpix 995 since the CP-L's are inexpensive for it. I was wondering if anyone else has tried this and gotten good results?
With 2 stacked CP-L's I was able to almost completely block light going to the camera - or increase lighting conditions. 2 stacked CP-L's inherently blocks 3-4 stops of light - but even in most cases that wasn't enough to block out enough light for the photos I took.
This allowed me to get the silky pictures of water falls in broad daylight.
Al, a.k.a. Yogi Bear
#1. "RE: Stacking CP-L's" | In response to Reply # 0JBish130 Basic MemberSat 25-Jan-03 08:40 PM
Please post an image using this process. I would like to see the results!
”It’s light and nothing more…”
#2. "RE: Stacking CP-L's" | In response to Reply # 1bobj Charter MemberSat 25-Jan-03 10:22 PM
Any two polarizers set at 90 degrees to each other will remove virtually all light -- the first one allows through only light polarized one way, and the second cuts out that as well (it would pass light polarized with its own orientation, but there won't be any since it would have been stopped by the first). Varying the orientation of the second polarizer allows you to vary the percentage of light transmitted. The closer to the same oriention the two poalrizers have, the less effect the second one will have.
I have done this with an F100 when I forgot to bring a regular ND filter with me and wanted to take a long exposure of a waterfall.
Nature Photography from the Pacific Northwest and beyond