software hardware inconsistency

[petiot]

Hi

I noticed something during a test i have done after my 10D came back from canon for focus recalibration:

when i view the picture with the "canon file viewer utility" software, the squares showing the focus area are not at the same place compare to where they were in the view finder (... am i clear?). On the file viewing utility, all focus rectangle appear lower (by half the size of the square) that they were when i took the picture.

I was wondering if this is due to the fact that the file viewing utilty focus display is just a "dumb" display, or if the difference of position could actually explain the focus problem found on some 10D??

Thank you

Dan

[siwatkins]

petiot wrote:
Hi

I noticed something during a test i have done after my 10D came back from canon for focus recalibration:

when i view the picture with the "canon file viewer utility" software, the squares showing the focus area are not at the same place compare to where they were in the view finder (... am i clear?). On the file viewing utility, all focus rectangle appear lower (by half the size of the square) that they were when i took the picture.

I was wondering if this is due to the fact that the file viewing utilty focus display is just a "dumb" display, or if the difference of position could actually explain the focus problem found on some 10D??

Thank you

Dan


I've just tested mine for you - found the results perfect. There was exact correlation between what I saw in the camera, and what was displayed in FVU.

The very easy way to do a sanity check, is to actually display the focus indicators in FVU on your monitor screen, and then photograph it, making sure you are at an appropriate distance such that your focus finder squares sit over the ones being displayed in FVU.

Take a look at the resultant shot, and you'll see if the marks in the camera are misaligned with those shown in FVU.

Taking a picture of your monitor screen is also a very good way of ensuring the integrity of your whole finder alignment, AF sensor alignment, and cmos sensor alignment. When you focus on screen, in either manual or AF, at the exact point of focus, you will see a moire pattern in the viewfinder. If AF and manual focus coincide, and in the resultant picture, you see moire, then everything has to be aligned correctly.

Simon

[PacAce]

If I'm not mistaken, the focus marks only tell you which focus point you used. It doesn't really tell you where you focused on the image. I say that because most of the time, I focus at a particular spot and lock the focus and then recompose. Looking at the image with FVU, it correctly indicates with AF point I used but not where the AF point was when I got the focus lock.

BTW, the AF points in FVU are always displayed centered on the frame, just like what it looks like when viewing through the viewfinder on the camera.