I just recently added my first 90mm to my M6 arsenal and I am finding my focus patch won't match up perfectly at infinity...meaning, if I were focusing on a flag pole in the distance, I will see the two poles converging oh so close before it just stops, meaning they will not converge. The lens will reach infinity but the focus patch won't. I haven't developed film yet to see if the images are soft but I don't have any obvious issues with my 50 or 35.
I've read about rangefinders having to be adjusted for longer lenses but I am not sure about this.
Is this something I can adjust with the horizontal adjustment screw as seen in this link?
Is this beyond a non technical person?
I should probably see my film first, huh?