This is the Leica-R Macro-Elmar 100/4. 











This version has no focus ring, you have to use a bellows with it.

















You could replace the original one with a Leitax mount of your camera system, and use your bellows.














But I will use the original Leitz one, this way you can use its auto-macro capabilities
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The bellows mount has six holes.













But this internal rim doesn't allow the use of the standard Leitax mount, we have to use the special model for the Telyt 400/6.8
















Just screw it, paying attention to the red point position.










And now we can use this excellent combo on our modern digital camera.
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