50mm 1.8 ?

[Bruford]

I have read allot good reports about the 50mm1.8 II. But something is bothering me a bit. The lens has a plastic mount, my 10D has a metal mount. It seems there are some rough edges on the camera mount, its not real bad just rough. I am worried that mounting an removing the lens may scratch the plastic mount, causing small bits of plastic to collect in the camera body and thus on sensor. Am I overly concerned or has others noticed this?

[Belmondo]

If you take your lenses on and off a lot, wear on the mount could be a concern as far as maintaining the dimensional integrity of the mount, electrical contact between the lens and body, and proper alignment of the lens to the sensor. Even so, it would take a long time to see sufficient wear to cause any problems at all. The plastic they use is very tough, and to a degree, self-lubricating (i.e. slippery---low coefficient of friction).

As to your concern about plastic shavings getting into your camera, that's just not going to happen....ever.

[Ikinaa]

I don't know how others do it, but when I change lenses, I always point the camera slightly down, so that the mount is facing downwards. This way, nothing can fall into the camera.

[Bruford]

Ok thanks for the input. Helps to know the plastic is durable. I just wasn't sure how durable it was. I suppose if I'm carefull it wont be a problem.
Good point Ikinaa. I do try to do that, but there are times...

[12345Michael54321]

Your concern is one of those things which makes some sense in theory, but which isn't all that significant in the real world.

If one plans on installing one's camera and 50mm lens in an atomic powered lens changing machine, which will mount and unmount the lens countless thousands of times (for who knows what sinister reason), the 50mm f/1.4 is probably the way to go.

For normal amounts of mounting and unmounting, the 50mm f/1.8 MkII should suffice.