I have a Leica M10 since April last year combined with a summicron 35mm. Since last month I add a summarit 75mm 2.4 to the family. I am facing a couple of issues since then and I am not even sure if they are related. When I put on the 75mm for the first time the camera did't recognise the lens, than after moving in the menu to manual and then again to auto again the problem was solved. Latter I started to have a new issue. On a random basis the buttons ( Menu, Play, Lv) does't work. Everything else work perfectly. It can be only a perception but I started to come to the conclusion that after switching to the summarit 75mm the problem tend to appear. Today it happened again after having been using the 75mm lens for a while. but this time on a permanent way. They do not worked at all.
After several attempts I realised that pressing the shutter at same time the buttons ( Menu, Play, Lv) worked.
Then, after have redding about the internal battery, I kept the Leica switch on during one hour. The problem seems to have disappear. However I am affraid that, if I switch again to the summarit 75mm that the problem will re-appear.
Anyone have experience this type of issues?... Any clues on the causes or on the solutions?
Cheers