Originally posted by er1kksen I feel there are noticeable differences (to me) in the images produced by the various APS-C cameras I've had, even viewing at reduced size on screen.
When you put it this way, I cannot disagree. I'd adjust my statement to say, the differences won't be noticeable "to most people", or to the extent they are noticeable, they won't necessarily *matter*.
While it's true that different people will have different requirements, and obviously differences between cameras *do* exist, I'm just trying to put a little perspective on them. Sometimes one reads these reviews or looks at 100% crops in threads like this and gets the impression that we're talking night and day, even-my-grandmother-would-reject-the-lesser-camera kinds of differences. if a person has examined the images *in practice* (not just test samples at 100%) and truly determined that for their purposes the differences are significant, then fine. I'm just suggesting out that one shouldn't *assume* the differences will matter that much to him as much as one might imagine from the degree to with people obsess about this.
In particular, as I said, I'm someone who shoots high ISO a *lot*, and of course I can see the differences between cameras when I look for them. But even to me - someone who by necessity shoots high ISO a lot for concert photography - the differences in high ISO performance are not really enough to outweigh other considerations in choosing a camera for my own usage. Sure, high ISO performance is a factor like any other, but I wouldn't weigh it more important for my purposes as a concert photographer than, for instance, ability to do DOF preview (and without a mirror flip). I would of course reject a camera if it were *terrible* at high ISO compared to others, but as I said, the actual differences in practice just don't appear that large to me - and I've done about as much of this sort of comparison as anyone, I'd wager.
But I don't deny that for some, these differences may be more significant.