Originally posted by Culture Is this true for other makers then. This person uses an old nikon camera with a manual lens.
No, it is not true for Nikon, either. His statement is false for any manufacturer. The grain of truth that lies at the base of this false statement is that with any lens, there will come a point where increasing sensor resolution won't help much. This is just common sense - if you try using the bottom of a Coke bottle as a lens, you'll get a lousy picture and no amount of sensor resolution is going to help.
But it's not like there is going to be one magic threshold for a given lens where increasing sensor resolution helps ol,y up to that point then suddenly stops. And of course, even if there were such a point - which there isn't - it's not like the lens would stop working if the sensor has higher resolution. You just wouldn't be taking full advantage of the sensor resolution. But again, there is no hard and fast line; it would be more a matter of increased sensor resolution having "diminishing" advantage the higher you go, as upposed to the advantage suddenly becoming zero.
And whatever the point is where the advantage starts to diminish, it certainly isn't the same for all manual lenses, or even all Nikon manual lenses. But only an extremely poor lens wouldn't be able to take advantage of sensor resolution beyond 10MP.