Hey all, after much research and help from board members I made some changes to my DIY exposure unit. I removed the glass from the bulbs, but added glass to the top to help with registration by creating a tighter seal between the screen and the film positive.
I also purchased an exposure calculator from Ryonet. I just tested it out with an exposure time of 15 minutes, and the attached picture shows what I got.
The goal is to have 7 solid steps, and by what I can see, I'd say I have 6 solid steps? Or am I reading it backwards?
The exposure correction table that came with the calculator says to increase step guide by 1 step, multiple the original exposure time by 1.4, to increase by 2 steps, multiply by 2.0, etc.
Would you say I should multiply by 1.4?