In a message dated 98-02-14 09:44:15 EST, [EMAIL PROTECTED]
writes:
> When you say radial type of polarizer is that the same as circular as
> opposed to linear?
Yes, I meant circular, sorry.
Polarizers are also great for roster shots -- you can adjust them to wipe the
sky's color influence right off the side of a new paint job for maximum
accuracy. Of course, there's nothing more accurate than the sun directly
behind your back at 3:00 p.m. (rule of thumb is when your shadow is as long as
you are tall). John Corns is quite right about the 90-degree rule; thus,
polarizers are of little use for railroad action during the first and last
hours of sunlight, when the sun light is prettiest without it.
Stacking polarizers let's you photograph solar eclipses, by the way. When the
lines of the polarizer line up, they go almost totally black. But they, too,
are adjustable.
John Corns is also quite right about the 1 1/3 stops of the polarizer. But
somehow on my cameras that's still a bit dark, so I open up from that. yes,
meters do work through the circular polarizer, but you'll get a more accurate
reading with it dialed to the brightest, since you usually want the dark areas
to be dark in the final exposure and not to influence the overall frame. I
don't have a modern EOS or F5, so I don't know how these bodies handle the
polarizer.
But a polarizer can turn a dark unit into a black hole, especially a steam
engine. Get familiar with the polarizer, so that when you really need it your
not afriad of it.
Remember, if used correctly, it shouldn't be noticeable. Interpretive
photography is the exception to that, though. I have the same opinion about
burning and dodging in the darkroom -- you'll never know if it's done right.
But that doesn't work for the interpretive printers, either. But I'm more a
documentist than an artist.
....Mike
-> SPORRS: Serious Photographers of Railroad Related Subjects
-> Web Site: http://www.anet-stl.com/acphotog/sporrs
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