edge100 wrote in post #17292052
Interesting. Any reason this would not work by putting a blue filter on the lens, rather than the light source? I can't think of one (I ask simply because I already have a blue filter - for tungsten-to-daylight correction).
It should work the same but I don't have a blue lens filter. In fact, my "blue filter" right now is a piece of cut out from a transparent blue binder divider.
I have ordered a Kodak 3x3 gelatine CC50B filter on Ebay. $3 shipped. You can even use some flash gels over the light source if you can. The issue I have right now is that you get 2 stops lesser light. I have to bump the ISO to 400 instead of 100. And using 1/50s shutter speed instead of 1/80s.
Still, the inversion still have too much green and cyan initially (still correctable tweaking the tone curves of each individual RGB channel) but I can now at least invert in CS5, rather than using Vuescan. I still have to load up ColorPerfect in order to get a reference shot to fine tune my color balance. BTW, I am still using the ColorPerfect the trial version. If I have an extra $70, I would just invert it with Colorperfect and be done with.