Stefan Gerris wrote:
Hi all,Stefan,
After a friend showed me a couple of "red-eyed" family snapshots, and I showed him some "polarized" landscape shots, it didn't take long for me to think about the possibility of using a polarizer to prevent red eyes...
I prefer to use reflected light from the flash unit (ceiling, lumiquest,
omnibounce), but sometimes that just doesn't work because you loose
maximum range. Adding a polarizer won't extend the range either, but at
least you could use the flash's ability to change focal length! Does
anyone have any experience with the combination polarizer-flash? You
cannot really preview the effects, so setting the polarizer is a bit of a
gamble, but my guess is it should be possible!
It sounds quite possible, but you actually need to apply cross-polarization: one pol filter on the lens and one pol filter on the flash. They should cancel each other and that can be a tricky thing to setup. One way to check is to hold the polarizer that goes on the flash in front of the pol on the lens. Turn the one on the front until you cannot see through the lens and make a mark on both. Now place the polarizer back on the flash with both marks pointing in the same direction.
Given that each polarizer costs you about 2 stops, you're actually loosing a lot of power (but you'll have fun, for sure)
Be aware that the effect of a polarizer in the skin of people can be very unflattering. It could be that you would enhance subskin features like veins.
have fun,
Gerard.
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