I have got a very early Agfa Record in a Compur with a 10.5cm Solinar lens. It has cleaned up very well however, somewhere along the line the front element has been tampered with. I am assuming that, focused at infinity the front element must be screwed right in and that I must move the longer stopper screw to make this happen. One full unscrew rotation should set focus at 3ft, but I need a solid starting point.
Also is there a simple way to adjust the popup viewfinder so that the framelines agree with the image on the film?
It's not hard to set focus on this thing but you need a ground glass or frosted surface to set at the film plane.
Focus on infinity, a radio antenna or light fixture a block or three away will work. Most of the lenses I've seen like this don't go flush against the body at infinity but have a slight gap. The dimension of the gap isn't important, just getting the focus at infinity..Close focus just is what it is. There's no separate adjustment.
FYI, Some blank processed colour film (with the orange mask) works well as a (very) makeshift ground glass, as well as the frosted variety of tape (selotape, stickytape, whatever people call it). Make sure it sits reasonably flat at the film plane and calibrate away.
I had a go a few days ago with a piece of pictorico printed light grey but it did'nt work so well so I will try the tape. Fantastic camera but so far I have stuck to f16. So small and useable, a revelation.