The camera was an Ansco 5x7 fitted with a 4x5 back. The lens was the kodak 203mm. I was the taker of the photograph and made up my own reciprocity for the exposure. I would just like to comment on the workshop briefly. Ron is a wonderful and extremely knowledgeable gentleman. Never in my widest dreams did I ever imagine that I would be coating my own paper and film. Highly recommended to you all!!