Jean Paul Sneider wrote:.
Someone knows the exact size of the filter?
You may be able to get a replacement sensor cover glass from BMD if you ask through their service channel. You should then be able to work out the size.
It will be most important to make sure the thickness matches of whatever glass you replace it with. The collimation of a lens is GREATLY affected by any change of optical surfaces behind the lens.
It's held in place with a rubber o-ring, it's not difficult to replace if you know what you're doing.
The very big danger is not being able to do this in a super clean environment, anything less than a proper "clean room" and you're probably going to introduce dust to your sensor surface, or on the surface of your replacement glass.
JB