The answer to the last question is yes, it applies to all marques, but only Pentax and Nikon supply a user solution.

It was a problem in film cameras too, but one of film flatness, and not that well recognised.

The problems in digital are different and also exacerbated by us looking at our images with huge degrees of magnification!

When you focus manually you focus until the image is at its sharpest on the ground glass. The distance from the ground glass and from the sensor have to be the same and fixed, otherwise all shots would be off.

Therefore I'd suppose that the change being made is to the AF calibration so that its focus point coincides with the actual focus point, rather than anything being physically moved.

There will be a few factors involved, such as also the accuracy of the lens manufacture and its ability to stop dead in its tracks at the focus point, rather than over-shooting.

Has anyone tested the focus point from both directions? That is, say when focusing on 5m has it been tried from the lens starting at the closest focus as well as from infinity? Does the lens focus equally well from both directions? If anything I'd expect front focus from one direction and back focus from the other in a fairly consistent manner.

Being able to set an adjustment for individual lenses as on the K20D seems like a good feature to have.

Glad to hear all will be well.

The aperture of the lens needs to be F2.8 I think to use the 1.7x converter properly with AF. Especially at the longer end of the zoom, the AF system will not have been able to operate properly.

I think we have found the reason.

Try again with just the zoom and you should have no problems.

You have to make sure your membership is linked properly - somewhere in "My Settings" I think.

I've changed the title to make it clearer, which I hope will help.

Please only post a subject once in one place - it will be seen. Multiple postings are confusing.

Many thanks.

Page 79 of the manual. Go into the sensitivity page of the menus and select D range on or off by pressing the Fn button.

This restricts the ISO range to 200 to 3200.

Hope that helps!

Please only post a question or topic once - I've deleted the duplicated one.

Many thanks.

I've just spent a couple of hours covering flash problems - if anything the K10D and later cameras under-expose flash rather than over-exposing it. I would guess the main subject is close to the camera perhaps?

Posting an image will help with the diagnosis.