[doubice]

Hello Enrique,

Yes, Don is a Master with a capital 'M' ! As to your focusing problems - can you ellaborate as to what they are?

I'll give you just a few hints to start with....: The thread mount Leicas have a relatively short rangefinder base so, accurate focusing is critical and requires more care than focusing a 50mm lens. First of all, your IIIc has a diopter adjustment next to the rewind knob - is it adjusted properly for your eyesight? If you move the lever back and forth, you'll see the rangefinder image go in and out of focus - leave in the sharpest position.

When you say that you are having problems focusing - does the lens focus to infinity when you use the rangefinder? I would assume that Don would have callibrated the rangefinder so, if your rangefinder images do not coincide at infinity, the problem could be the lens' focusing cam. On the other hand, if the rangefinder images do coincide at infinity, but the image of an object at infinity is not sharp, the problem most probably lies with the lens that is out of adjustment.

When I refer to 'infinity' - that is not just an object across the street, ideally you should focus on something at least 500 meters away. A moon in the night sky is the best infinity test subject.

As to your Walz finder, that is used only for framing and has absolutely no effect on accuracy of focusing.

That is about all I can diagnose over the net without having any other information from you.

Best,

Jan