Quote Originally Posted by BradS View Post
...but, you'll need a shutter much faster than 1/100 of a second to get into reciprocity failure...right?
I suppose I was unclear. I'm looking for an exposure faster than about 1/2 second, as this is where films like FP4 and HP5 start to exhibit poor reciprocity characteristics, according to the data sheets.

For example, the white light Wejex sensitometer I have sitting in front of me has a fixed 2.5 second exposure time. I suspect that the contrast over a 10-stop range might be different in this realm than in the range of 1/50 to 1/100.

I hope that makes sense.