I guess my question is even more basic...I have no idea what an f-stop timer is...and, being monday, my imagination isn't conjuring anything up.
What is an f-stop timer?
How is one used?
[EDIT:] Hmmm, ok. I just checked out the Darkroom Automation website...I see what it is. I guess I can multiply and divide by two reasonably well, so, probably don't need one.