I just ran some camera tests on the Sony F55. We're shooting an MFA thesis film at Emerson College in Boston and this was our first test. Here's my question:
Why does shooting with a Red 25 filter yield such extreme contrast after converting to black and white? We're shooting the entire film black and white by simply turning the monitor to b&w, then reverting the Raw images to be graded in post.
Our tests with yellow filters and blue filters converting to black and white yielded similar results to using color filters with b&w film, increasing contrast. Shooting with a Red 25 then converting to b&w out looks like some kind of Microsoft paint filter, like a posterize effect.
Can anyone explain why this is? I've shot with red filter and converted to b&w on DSLRs and they simply make a blue sky black and bring out the whites more in clouds.