[pure-silver] estimating filter factor: gray card?

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. 


I can't really bracket when shooting large format film.

I am thinking that although the filter factor is supposed to be 2, that seems excessive to me given that it only changes the reading by a third of a stop. I am thinking something like 1.5 would be more accurate.

I wonder if it's better to meter a gray card, rather than meter the shadows?

--shannon




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. 

=============================================================================================================
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.

Other related posts: