But strange it's only the top left corner, if it was the filter I would expect it to effect all corners, that's why I said some dirt on the sensor.
Just very strange...

Yeah look at the sigma site for the correct information.

RR some Sigma lenses for Pentax do have HSM, don't know if that's very recent or not?

Well you need HSM with the canon or Nikon since they don't have a screw-mount any more for the AF.
Sony and Pentax don't have HSM.

So actually you can say there are 6 flavours, Canon, Pentax, Nikon, Sony, FourThirds and Sigma.

Wrote some things down before seeing the photos, but that's quite strange.

Could it be that it only shows up with photos with a small aperture (high f-number) if so then I've an idea what it might be.
Probably some dirt on the sensor or on the filter but the later is less likely.

Don't forgot the time between the models, the D80 is just as old as the K10D and that isn't produce any longer either.
Also they upgraded a lot of hardware but it looks like the K-X and the K-7 shares a lot of the same components to save cost, if they also need to produce the K-M, K20D and the k200D then they need more lines more supplies of different parts more costs.

Matt if they place the K-X sensor in the K-M how different would the two be then? Video mode is purely a software thing. I think the cost to make the K-X and to keep the K-M in production are the same.

Ken are you also counting the FF camera's that isn't really fair right since Pentax isn't in that range.

Ti it is then, it sounds cuter

Don't you worry about it, I'm just saying that I'm not ready to call you that forever and I could shorten it to Tech if that's okay with you

Hoya makes the glass for the lenses and in such have at least experience in lens design. Kodak make camera sensors, important part of the camera so in such a way I mean it.

Hoya has more experience in lens design then Samsung at least.

I'm actually quite satisfied with Pentax now, I don't need anything more or less and I like the way they are going with putting as much as they can in a small body, it suit me.

But well some budget primes would be nice and one longer DA* telephoto prime and zoom, then we would be well covered I believe.
Oh and a fast wider prime and 1.4 TC

Yeah but we're allowed to call him Ken, however Technoidiot don't like to be called by her real name. I'm feeling a bit uncomfortable with it, the same as calling Ken Beginer.

Alan, you're right about that but I'm trying to get under the need why people make art.
I'm sure there are countless of reason to think of to make a photo.