This chart is, at best, simply a starting point. As is determining
the factor via your meter.
As others have said, all meters don't read color, the same way. Also,
what you are photographing will make a difference. As does the film
and developer that you use.
The ONLY way to be safe, is to bracket. From the bracketing, you will
be able to figure out YOUR factor for THAT FILTER, with that subject,
film, and developer. Which makes it easier the next time you use that
filter in a similar situation.
I have several brands of red, green, yellow-green, etc, filters. My
B+W 060 YG filter takes a different factor than my LEE YG resin
filter. Likewise, actually, with all of my other filters that I have
duplicates of, from Hasselblad, Lee, B+W, and Heliopan.
All of my Hasselblad and B+W filters have the factor inscribed on
the filter. This is actually very close for most photographic
situations. But I ALWAYS bracket because, as I (and others) said,
your subject does indeed play a role in a valid exposure through a
colored filter.
Jim
At 07:04 PM 9/29/2006 -0500, Shannon Stoney wrote:
http://en.wikipedia.org/wiki/Filter_factor
An interesting article about filter factor with a handy chart. My Hoya K2 apparently has a factor of 2, which sort of surprises me.
============================================================================================================= To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there.
