Oops, I'm all of these.

First attempt: I calculated everything basically right.

Fuck yes.

Tested the medium format macro monstrosity on hardenbergia flowers, a rat skull, and a fox skull.

In theory this thing should have excellent image quality (the 50 1.8 is surprisingly nice) and be a nightmare to actually use. Note the almost total lack of exposure control, so I will probably only be able to control exposure with flash or filters, or just having the correct lighting to start with.

The obvious side effect of this is the changed focal distance: 51.5mm from lens to subject, which cannot be adjusted.

Aperture: fixed and unknown.

Shutter speed: set by the brownie, so only 1/45 ish or Bulb.