Originally posted by jsherman999 .
Marc, did you read that linked article? It illustrates what I'm talking about better than I did, I encourage you to read it.
I read it a while back. Like I said, I agree the concept of cameras and lenses not being perfect is real. I'm just saying that, assuming one's camera is within manufacturer's spec, the *magnitude* of the problem is not such that one should expect to be unable to focus at f/2.8. Any camera or lens that was so far off as to not be able to do that isn't slightly out of calibration - it's defective.
Quote: Also, it's not really a "hack" in anything after the K10D - it's a feature
I'm using "hack" in the computer programmer sense, not the sense of a "hacker" doing something illicit. A documented feature can be a "hack" too. Something is a "hack" if its an inelegant solution to a problem, whether the solution is documented or not. A camera can have a BF or FF problem if its AF sensors are physically misaligned. Working around a physical misalignment via software is a "hack" in this sense - the *correct* solution is to align the sensors properly. My understanding is that there are screws located on the underside of the camera that are designed to be used for this very purpose. Working around the problem via software without actually aligning the sensors properly is what I am calling a "hack" - an inelegant solution to a problem that has a much more straightforward solution.
Again, only if the sensors are *way* off am I saying they should to be corrected physically. Otherwise, the software workaround is fine - it's probably a more appropriate solution, since it's pretty doubtful one could turn the screws as precisely.
Quote: Anyway, if that feature had never been available, we'd all find ways to survive
, but the fact that it is available is welcome, and desired, and is now a criteria that's important to me.
And as I said above, I have no interest in talking anyone out of wanting tha feature. I am just trying to reassure potential customers that not having the feature does *not* mean you can't focus at f/2.8. It doesn't mean it for the K-x any more than it has meant that for the hundreds of other camera models that also lacked this feature.
Quote: I'm not 'covering up' anything with a 'hack' - I'm using a software option thoughtfully made available to me by engineers who understand the bugbears of tolerance ranges.
If your camera's AF sensors are so far out of physical alignment that they can't focu at f/2.8, then I'd say you are indeed covering up this defect using this "hack".
But I'm guessing that's not the the case - your camera is probably *not* defective, and would be capable of focusing at f/2.8 even without adjustment. You are presumably just tightening up those tolerances. So my comment wasn't directed at uses of this menu likes yours - only uses to cover up a real hardware defect. And I'm not saying it would be immoral to do that or anything - just that there *are* better solutions if you have problems so bad that you can't focus at f/2.8.