Re: focusing hektor 135mm on IIIc body
The Leica II (the first one with a rangefinder, in 1932) did not have any focusing lever for it. It went in with the III, which had its rangefinder magnification raised from unit to 1.5x, in order to improve focusing of the 13.5cm lenses, in fact! This made focusing for far and near necessary. Note that there is an infinity mark on the lever!
It was NOT for eyesight correction. That would have been fairly useless as the finder is not helped by it. Correction was done with separate lenses screwed into the two eyepieces, and these lenses were sold in pairs! But 'authorities' who have never even tried to use a LTM Leica but only copy each other's errors have perpetuated the 'dioptries' myth.
The old man from the Age of the IIIc
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