Add a Focus Knob to Any Lens!

Early Leica rangefinders were so small that focusing their tiny lenses with the conventional thumb and forefinger method was cumbersome.  So Leica came up with a simple, elegant solution, as Leica often does; a focus knob. Many classic rangefinder lenses have a focus knob to aid in speedy, accurate focusing. The focus knob allows for […]

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