How accurate should the focus point be?

I'm trying to see how accurate the focusing is on my K10D because I always seem to be missing the mark and my images sometimes seem softer than I expect. Well, on my K10D, the center focus spot actually seems to be at or below the lower left corner of the spot meter circle "( )" area in the view finder. Also, the exact location seems to move with the focal length of the lens used.

FYI, I set up a piece of paper with a distinct design so that it was on an angle to the camera. I simply compared the final image with where I focused. I would expect a bit more behind the central focus point to be in focus than was in front, but it is usually quite the other way around. (and not 1/3 v.s 2/3 but sometimes 1/5 v.s. 4/5 -- based off the true expected center point)

Is that something I just have to live with and adjust for, or do I need to send the camera for adjustment?

Have you tried using the select focus point function.

If you set it to centre and then take the picture do you get the same problems? In my experience the automatic function doesn't always pick the correct place to focus on and then gives the problems you describe.

Also try the following link http://en.wikipedia.org/wiki/Depth_of_field

Yeah, I don't really care for the "random focus" feature, so I always keep it on center.
Or do you mean that the manual selection set on center will actually work differently? Hmmm, I guess I could try.

The first image at that link is somewhat what I was doing, but a bit more depth of field. Using that image as an example, one would expect that the user was probably focusing at or near the bottom half of of the middle line. (1/3 in front 2/3 in back, very roughly)

Instead for me to get the same image, I would need to focus my center point on the bottom of the first line. (1/5 or less in back, 4/5 or more in front).

Your eye needs to be centred exactly in the middle of the viewfinder eyepiece, otherwise you might well get some apparent shift.

Yes, you might need to take your eye back for re-calibration, or a replacement or refund.

G

Exactly right, George.

Just buy a Katz Eye screen. Make life easy.

well be glad you don't own the samsung.....http://news.com.com/2300-1041_3-6167969-3.html?tag=ne.gall.pg