SFX200 and a 25A filter - Exposure comp?

[skullfish]

Hey all.

I'm just messing about with a roll of SFX 200 and a 25A filter, and was wondering if anyone had a definitive answer to the exposure compensation I should apply to the camera? I've heard anything from no compensation at all (due to the film's sensitivity) up to -3 stops.

I've taken a few bracketing shots with the first half of the roll, but would really like to get a few keepers out of the second half.

 

[JohnW]

This is a combination I have used a lot - well with a 25 filter anyway.
I don't know if the 25 filter I used to use is the same as the 25A you have, if it is then one and half stops extra is the way to go.

 

[skullfish]

Excellent, cheers.

I'll stick to 1 1/2 stops and see how it goes.