designed the Leica-Nikon mount to be used with most Leica-R lenses, so
the carved space in the Leitax mount has to allow the movement of
the aperture ring from the maximum to the minimum aperture values of
But some models have a limited aperture range and, therefore, the Leitax mount will allow the aperture ring to exceed these max and min values.
To solve this problem, I suggest this easy solution to have hard stops at the two extreme positions of the aperture ring of any Leica-R lens.
|This is the plastic corner also used to glue a Dandelion chip on a Leitax mount.|
|We have to cut it in two halves, be careful, use a proper cutter or you will deform and spoil the corner.|
|Ready, we need a clean cut.|
|Now put the diaphragm ring to the minimum aperture of your Leica-R lens.|
|The R-cam of your lens will move to this position, now you have to mark the left side of the top step of the cam.|
|The same operation for the maximum aperture position.|
|Here we mark to the right side of the R-cam.|
|Ready, the two positions are marked.|
|Now remove the Leitax mount.|
|I use the Nexus glue |
(it is a non-instant cyanocrilate)
|Applying the glue at the Leitax mount and pressing the corner halves for a minute at the marked positions.|
Please leave the glue to cure some minutes more before reinstalling the bayonet on the lens.
|Ready, put the mount again on your lens and check the results.|
Now the aperture ring cannot exceed the final F-values because the R-cam collides with our glued hard stops.
|And this is the other side.|
Now you can use the lens aperture ring with confidence, no risk of trespassing the final F-stop positions.
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