rjlittlefield wrote:
I have the impression that only the upper part of the reflector will be able to see the light source, while more than the lower half will be shadowed by the barndoor. Is this correct?
--Rik
Yes, but I expect to use mulitple flashes.
lauriek wrote:If the diagram is accurate it appears to me like the light will have to come in almost perpendicular to the lens to reflect onto the subject?
Yes, on further reflection (pun intended), I think a redesign is in order

This curved reflector doesn't offer any advantages over just a flat plate and actually looks like it would be more restrictive for where the flashes can be placed.
A real Lieberkühn reflector would be much better as it concentrates diffuse light at the focal point. I would need to use thicker stock to make one and also figure out how to machine it.
The primary requirement for this lens board is actually on the back side. I want to be able to use this at the minimum magnification. If I remove the recess at the rear of the lens, it will allow the lens to fit about 5mm into the mirrorbox on my camera (4/3rds mount) for an extension of 33mm (+ distance from the rear of the lens to the first principal plane). If my measurements are correct, there is actually closer to 8mm available between the mirror and the mounting flange. If they're wrong, I need a new camera anyway
