Monday, 5 Jun 2023
I like the 35mm Zeiss lens I use on my M11. Oh, sure. I’d love to have the new Leica APO-Summicron-M 35 mm and maybe the next time I have a spare $9K I’ll get one :-) Until then the ZEISS C Biogon T* 2,8/35 ZM (official name) will have to do.
![Focus nub](./t-6301.jpg)
Focus nub
As nice as the C-Biogon is there is the slightly annoying focus nub that Zeiss uses instead of a Leica style focus tab. I much prefer the focus tab.
![Possible improvement](./t-6302.jpg)
Possible improvement
Perhaps this will help. It is a stick on focus tab made by 7 Artisans for their lenses. It can be made to fit according to something I found on the web. Cheap enough (about $8) to try.
![Remove 5.25 mm](./t-6303.jpg)
Remove 5.25 mm
![5.25mm backing removed](./t-6304.jpg)
5.25mm backing removed
![Attached to lens](./t-6305.jpg)
Attached to lens
The tab uses a 3M double sided tape to attach to the lens. However, the Zeiss gives me a strip a bit less than 6mmm wide to attach a tab that is between 7.25 and 12 mm wide. To make this work I only removed 5.25mm of the backing from the double sided tape.
![Where it attaches](./t-5059.jpg)
Where it attaches
![Rotates freely](./t-6306.jpg)
Rotates freely
The sticky tape attaches to the focus ring, not the fixed body. The focus ring still rotates freely. No change in feel.
![Lens on M11](./t-6307.jpg)
Lens on M11
![At the 1.5M focus position](./t-6308.jpg)
At the 1.5M focus position
Much better. Easier and possibly faster to focus due to the larger size of the tab over the stock nub.