Rangefinder vertical adjustment

[Dez]

I recently bought a Canon 4Sb2, which is pretty good but for a vertical misalignment of the RF images.

This is just beyond the adjustment range of the rotating window at the RF port. Taking the top off, I see that there are two small screws that appear to be securing the 45 degree mirror just behind the RF window, but I really don't want to mess with them unless I know I am addressing the right screw. It is usually obvious what needs to be adjusted, but unfortunately that does not appear to be the case here. Does anyone have a diagram showing the correct adjustment?

Thanks,
Dez

 

[paolo]

Here http://www.photoethnography.com/Cla...eset.html?AsahiPentaxSpotmatic.html~mainFrame you'll find some info about rangefinder alignment on Canon IV cameras

 

[Dez]

Thanks, Paulo, this is an interesting site.
Unfortunately it only explains the normal method of setting the vertical alignment, and this camera is outside the normal adjustment range. At some point, it has received a hard knock on the top, and that has thrown the alignment off. I am hoping there is an internal adjustment I can make to bring it back in line. The brute force method is to bend things in the internal mechanism, and maybe that is the necessary method.

Cheers,
Dez