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    • Hello Again Robert, As to why no range/viewfinder coupled focusing mount: I would think it was because the lens was intended for close-up work & it focused to 33 centimeters/13 inches with the standard 16464/OTZFO focusing mount. And to even closer distances with various adapters. While most M3's range/viewfinders focused to 100 centimeters/40 inches. And other "M" cameras range/viewfinders mostly focus to 70 centimeters/28 inches. Best Regards, Michael
    • Hello Robert, It looks like you have a lot of good options for close up photography. You are lucky. Some people have problems with other brands of adapters that are not Leitz/Leica, when they are adapting screw mount lenses for use on bayonet mount cameras. You might try 1 of the 14097, 98 or 99 adapters that I suggested above.  Any of those 3 can also be used on the back of the Visoflex II to make it usable with an M3. No need to unscrew or add on anything else. The arm that raises the mirror & releases the shutter is for EITHER a screw mount or for a bayonet mount camera. NOT for both. The arm can be interchanged with an arm for the other camera. Or, You can use the release arm to raise the mirror, lift up the arm & then release the shutter with a cable release. Doing the same with a Visoflex IIa (Button on the side, instead of a lever.) is a little different. The reason for the choice of 65mm for the close focusing lens most likely was: Leitz/Leica sometimes uses the approximate ratio of the square root of 2  (1.414+)  as a spacing multiplier for varying the distance between succeeding focal lengths that might be used to complement each other in a series. Such as succeeding multiples of progressively longer, long focus/telephoto lenses. Because this ratio makes each succeeding lens cover 1/2 or twice the AREA of the lens before. Such as: 200mm - 280mm - 400mm. The traditional "normal" focal length of a camera lens is often considered to be: The diagonal measurement across from the top left to the bottom right of the film/sensor image capture surface. For a 24mm by 36mm format that diagonal's measurement is 43mm (Approximately). Leitz decided to use 50mm (Actually 52mm) for the "normal" length in their Leica camera of 1925. But, when they decided to make a short, handy, multipurpose lens for their Visoflex II they decided to make it a little longer than the "normal" lens of 43mm. So, 43mm X 1.414+ = 61,2mm which was rounded up to 65mm. Which, when multiplied by 1.414+ and then rounded gives 90mm as the next lens. Handy. Best Regards, Michael
    • Customize Cont rol/Dials/Dial Lock. At this point it locks all dials. I would hope in the future one could select specific dials to lock or not lock.
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