Huss
Veteran
Some have said that burning a hole in the shutter of a rangefinder camera is a myth and issued a challenge. So I tried to burn cloth shutter material with a lens at infinity and f/16 on that one sunny day, but it didn't burn. Strange.
That’s because you had it at f16.
I’ve tested this at large apertures and it burns really quickly.
It’s also why Leica itself mentions this in the owner’s manual.