I have had my M-E for a little less than a year now. I have been used to getting the occasional dust spot, but recently my images (when there is a lot of plain sky for example) have had hundreds (no joke) of little spots.
I took it to the Leica dealer and they said they could not see any dust etc on the sensor so it has to be sent to Leica for warranty work. They also checked two of my lenses - both are less than a year old - and they are clean. No dots/marks etc in the glass.
Here is where it gets weird. I do NOT see the dots (hundreds of them and they look like little dust spots) when I shoot at infinity at the sky with a large aperture (2.8/4 etc)
But when I stop down to f16, the image comes full of them. This would suggest to me that it is the lens. But all the lenses, examined with a loop, are clean.
Any ideas? Is it the sensor? But if it was, wouldn't it show at all apertures not just stopped down? This has made shooting pale object stopped down unusable..
By the way, I will let them send it to Leica, I am just trying to understand what is going on.