[Spidy (Phil)]

Originally Posted by Craig_

Apparently the introduction of a filter to the optical path can also impact backfocus I am already using the Enhance (it screws into one of the extension rings after the field flattener) so it seems to be fine for me, but if you need 146.05 exactly you may also need to account for the thickness of the filter glass... apparently. I think the Esprit has a small margin of error in the back focus rather than needing absolute precision.

Oh great, more problems