Originally posted by audiobomber The point is, the inclusion of video in DLSR's generates more noise, therefore lower performance.
Originally posted by Clavius That is why it's such a shame that the video feature is forced upon us. [...] In the back of my head I know the performance of the K5 could have been even better, if that performance wasn't lowered by a videofunction ...
In the way this is stated the statements are false.
It is true that the K-7 sensor has some additional noise due to doubling the number of read-out channels. But this only applies to this particular implementation and would have been avoidable.
In particular, this argument does *
not* apply to sensors where read-out channels are digital rather than analog. E.g., the K20D/K-7 read-out channels are analog where the K-x/K-r/K-5 (Sony) read-out channels are digital.
With the newer Sony sensors, the faster read-out for video does not negatively impact the sensor's noise profile. Actually, it beats almost every still-only sensor out there.
Another topic: Camcorders vs. still image camera video function: Still cameras have the problem that they use a tiny fraction of their pixels only in video. This causes alias artefacts and noise. But I expect this problem to be solved in the foreseeable future: the pixels can be binned and combined right after the on-sensor A/D conversion. Therefore, I assume that camcorders will soon terribly fall behind still cameras in video image quality. However, it is true that this has not happened yet (apart from the shallow DoF special effect).