So I have a Wollensak enlarging raptar with 190mm focal length. I've tried it as a taking lens and while I kind of like it, I have a similar length lens I like better.

Can anybody help me predict what would happen if I spaced the elements differently? The best info I can find tells me that the raptar design is a rear positive cemented group (of ~120mm focal length) and a front negative air-spaced group (which I don't know how to measure the focal length). The iris appears to be right in the middle of the two.

The faces of the groups that face each other look to be about 5mm apart when they are all mounted up. What would happen if I mounted them farther apart, like 2cm?