Leica III backfocuses around 4 cm

[iek1968]

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Does someone know in which direction I should turn the rf adjusting screw and in what inrements?

Thanx!

[qqphot]

I forget which direction but it will be quite apparent once you try - set the lens against the infinity stop aimed at a very distant (1km +) object and adjust the rf adjusting screw one direction or another in miniscule increments, barely even more than steady pressure, perhaps 1/32nd of a turn at a time and it will be clear which direction brings the split images together until they are perfectly in register.   I haven't ventured into messing with the focus arm length adjustment because I worry I'd make things worse and the infinity adjustment seems to be sufficient for me every time focus accuracy drifts off.

[iek1968]

vor 11 Stunden schrieb qqphot:

I forget which direction but it will be quite apparent once you try - set the lens against the infinity stop aimed at a very distant (1km +) object and adjust the rf adjusting screw one direction or another in miniscule increments, barely even more than steady pressure, perhaps 1/32nd of a turn at a time and it will be clear which direction brings the split images together until they are perfectly in register.   I haven't ventured into messing with the focus arm length adjustment because I worry I'd make things worse and the infinity adjustment seems to be sufficient for me every time focus accuracy drifts off.

Ok thanks, I did it, it was pretty easy, but only my trusty Wiha 1mm screwdriver fit thru the hole. But then it got hold tightly of the adjustment screw.
Question: I thought the Screwmount Leicas dont have a focus arm length adjustment, just the Ms do, am I wrong?

Greetings