[pmrid (Peter)]

Originally Posted by cfranks

I just used a nylon 'stick', very carefully. My WO FLattener 4 is fixed focus and the diagram gives all measurements from the meniscus. I make my own adapters and thus had to find the meniscus-to-flange distance.

Charles

Thanks Charles. I'm working on the "bottom-of-the-meniscus "theory as well. It makes a kind of sense.
Peter