Following. I've had success with using my Canon 100 f/2.8 L IS on a 2600MC with standard spacing. Not perfect, and now that you bring up the subject, the edge performance could be down to spacing issues (I thought it was a lens thing)
https://www.iceinspace.com.au/forum/...d.php?t=191832
But I plan on using a lot of lenses in future so this would be an important thing to know