----- Original Message ----- From: "David Brooks" Subject: Re: Re: Filter question
> I recently bought a Tiffen #25 Red for the B&W camera. > The sheet said 3 stops.When i put it in front of the > clip on meter of the S3 it dove 3 stops,so it looks > as if that factor/meter relation is 'pretty close'.Time > will tell when i finish shooting this roll of Delta 400 What I found with the #25 filter was that it has a 3 stop deflection on the meter, but also an additional nearly 2 stop deflection on the film speed. I find with FP4+, which I nominally rate at 80, I need to do a + 1 2/3 stop exposure compensation when I use a #25 filter. William Robb - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
