Quote Originally Posted by jnanian View Post
don't forget if you use your current lens for close-work you might need to add extra light / time to compensate for bellows extension
This morning I had a close look at the bellows extension on my Crown, turns out it was just a simple matter of lowering the infinity stops on the rails, which then allows the bellows to extend much further. Doing this I was able to focus as close as approximately 1 metre. Much better!

As to your comment on compensation for the extra bellows extension, that is a new issue that I wasn't aware of. A quick google search shows a bunch of resources about the calculations involved, I'll now go and study it