P3D Re: A question for anyone

[Tom Hubin <thubin@xxxxxxxxx>]

Al Knecht wrote:
> 
>  A question for anyone,
> 
> I have a Revere33 camera and have taken a roll of slides from our family
> pool party. All slides depicting the water in the pool came out with the
> water looking pure "white".  As every other aspect of the slides came out
> beautiful, do I need some sort of filter or is it just my exposure or
> shutter settings are incorrect? If I do need filters, what kind and where
> can I get these?
> 
> Thanks,
> 
> Al

Hello Al,

You may have gotten a reflection of the sky, clouds, or sun from the
water. This will often be too much light and saturate the film. You can
often reduce light reflected from water and glass and other glossy
surfaces with a linear polarizer. I can suggest the proper orientation
of the polarizer for various circumstances but the best method is to
look through the polarizer at your subject. Then rotate the polarizer
for the best effect.

You can do this with just the polarizer (no camera) to experiment. If it
looks like it will help then mount the polarizer on the camera, rotate
the polarizer for best effect, and shoot. Common dichroic polarizers
pass about 38% of unpolarized light. That is about 2.8 stops.

At some angles of reflection the glare can be eliminated completely. At
other angles the polarizer might not change much of the scene.

You can get linear polarizer filters at photo shops with common threaded
mounts. If your camera has no provision for mounting filters then buy
some linear polarizer sheet or just a 2 inch square or circle from
Edmunds Scientific and tape it onto your camera.

Tom Hubin
thubin@xxxxxxxxx
AO Systems Design



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