Is there much of a difference between a Carl Zeiss camera lens and Scheider camera lens?

The lens produces a round image, but the part that captures the image (the sensor or film) is square. So, you get to keep only a portion of what the camera saw. The square fits neatly inside the r...

Glass cleaner will damage the lens coating and may (if you spray it on the lens) seep down in between the lens and lens barrel and actually attack the adhesives holding the lens elements. Here i...

If it's just the lens cover: ...

When the lens breaks off from impact damage it is usually not user serviceable, often not worth servicing. It appears that the lens movement assembly, or the sensors have been damaged. It is quite ...

Lens errors are fairly common. Usually it's sand or grit interfering with the lens extension mechanism. Or the camera's been dropped with the lens extended. Or the camera has been powered...

These numbers are focal lenghts in millimeters. When everybody shot 35mm film these numbers had a kind of universal meaning regarding how much magnification a lens has. But with digital, that ch...

I would send the camera to a repair shop.

Either is OK. Unless they have been exposed to high humidity, then disassembly will help stabilize the whole rig, and not keep moisture sealed inside the camera.