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Well_is_it
Right, I've got some RB67 issues. I keep shooting and even when I focus very stringently, the actual focus on the image falls in front of the subject I focused on.
I set up an experiment with the camera and a tape measure - I set the focus to 1.5m according to the guide on the side (180mm lens used). I placed an item (bottle Lea & Perrins) at 1.5m from the front of the lens. I then also placed an item (bread) at the point in focus according to the focusing screen (1.2m).
This suggests that something is wrong with the focusing screen in some way - the guide on the side says the actual focus point is behind where the focusing screen indicates, which explains that even with stringent focusing, the image is out of focus.
I've tried tightening the screws on the springs where the focusing screen mounts as suggested elsewhere, but the adjustment has minimal effect.
Any ideas on a fix?