[Jeffkop (Jeff)]

Hello All

I was wondering, is there any piece of glass that performs the job of say a focal enlarger for a TSA102 or BRC250.
IF there is what are the consequences of its use as far as the optics go .. is there some optical compromise I make by using it.

I was just pondering the thought of say increasing the F ratio of the BRC250 to F10 so it may better suit some targets.

Any information would be great

Thank You