> > As long as he has a Circular polarizer on the lens, the linear polarizer > on the light table will not cause a problem. The Circular pol. > effectively "de-polarizes" the light that reaches the metering system, > eye piece and AF sensor.
Ah, yes, that's a good enough working definition. On average "circularly polarised light" is non-polar. For metering of these scenes on a lightbox ... "what I do" is to take a meter reading with the polariser on the camera turned so the background area *looks* mid grey, then set it manually on the camera, then forget it. Turning the polariser back to the desired black background and the exposure is still right: the bits where the light is coming through the plastic are well lit. BoT As to polarised light ... the epxperiment that shatters the simplistic model is to place a third linear polariser between two 90-degree crossed polarisers. Guess what, with the middle polariser at 45-degrees to the other two light gets through. * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
