I was wondering that maybe A1 can be focused to 36x24mm or smaller frame without an expensive achromat as it has quite good close focusing capabilities?

My cad simulation shows that at the widest angle in can focus on 36x24mm frame from ca 25mm but minimum distance required to get rid of vignetting in dof adaptor assembly is somewhere at 50mm.

Can someone please test if A1 can focus a 36x24mm or smaller frame from 50mm to 64mm distance? Focusing on 32x20 frame at 64mm would be perfect.

Thanks in advance,
T

The best I could do for you quickly is a 58mm by 36mm target (the world's smallest Chroma DuMonde!) handheld at a distance of approximately 50mm with a focal length of Z50 (halfway through the zoom range). The other image is the edge of a ruler placed right against the front of the A1 lens bayonet mount... a distance of about maybe 9 or 10mm to the front objective. The width of the image is about 48mm, considerable less than the width of the front objective itself (which is 72mm). Hope this helps,