Hi all
I'm considering a folmer 717 and was curious what the longest lens that can be used on it as it comes, and what work around people have used to use longer lenses. I'm hoping to be able to use a 16.5" artar on it as is but would also like to somehow use a 19". The seller says it's max extension is about 16.5", but I've read of people using an 18" nikkor on it, so are there variations in the length of the bed or rail, or does the focal length not always equal the required extension? Thanks in advance

Gabriel