Thanks for your comments

Yes you are probably right about most of the images. As I said myself I am probably misjudging lack of contrast in the central part of the image ie the boat on the lake- any detail is masked by the low contrast but I would have thought that a big red square with white text that completely fills the brackets of the center point mark would be enough detail for the autofocus to work and indeed it was enough detail for the autofocus to work with the da 70.

The da 70 autofocuses at f2.4 the 77 focuses at f1.8 so I would have thought that the 77 would be more consistently accurate.

Anyway I am so worried that I bought a dud that I am probably looking for faults that are not there.

Thanks again

Thanks for the comments. At last I have put together some images.
image 8484- When the centre point was lined directly over the left red square it would not focus giving me the green flashing hexagon. Move it a little in any direction it focused and fired. Same with the image 8413 . I had my da70 with me so I tried that and no problem focusing but I suppose the lenses are too different to expect them to behave the same.


link

Thanks for the replies.
It is not in my signature. I bought a used 77ltd 2 months ago. Is this lens susceptible to focus shift?
WB daylight, various fstops and iso, centre point focus.

I looked through my photos to find some to post and looking at them again (he writes embarrassingly) it's probably my fault. I use centre point focusing and the images are at about infinity so I am probably misjudging the lack of contrast in the small object I am focusing on. I am sorting through them at this moment. I will post and so you can judge for yourself.

I have an FA lens which is focusing inconsistently.
It does it on both k10d and 20d. I have taken several shots on a tripod and it is inconsistent.

Could any body tell me what fault a lens could have to cause this problem? Dust, misalignment, focusing gears?

Any advice would be much appreciated.

KX likes dragonflys. This dragonfly was extremely cooperative. Out of the many attempts I think these were the best I could do.
f1.8 1/320
link

f3.2 1/100
link


f2.8 1/80
link
sorry my mistake. The above have been sharpened for screen on export from lightroom. The image below has not.

100% crop f3.2 1/100
link


All raw files. 77ltd. No pp only lightroom presets.

Any comments much appreciated

After reading all the problems with blured images from the k7 and the kx. I decided to return the kx and get a used k20d instead with 6 months gaurantee. Guess what. I put the 77ltd on the k20d and nothing but soft images. Nothing in sharp focus. So it seems that my lens is faulty. Still under guarantee so I will take it in.

This is a good point and could be the reason.

Thanks for the link. I didn't realise it had been designed to work better in the dark
I googled and found I am not the only person to think the images are a little soft. Apparently it is down to the SR over compensating and there is a firmware update that fixes this. I will update my firmware take some more shots and post some images.

Well I took some shots today and I don't think they are as sharp as they were with the K10D. I used my 77ltd and the images are disappointing. From what I have read on the internet the sensor is as good as the sensor in the k10 so shouldn't the raw image quality be the same? Has anybody else had a problem with image softness on with this camera.???

The files are raw. The camera was up for srgb so I'll change to adobe rgb. As I said this was a few shots on my way home to get used to the camera. I'll take some more pics today. I have a week to decide. I keep thinking take some like for like shots with the k10d oops I can't its dead. Only 35000 shots. Thats the problem I can't compare like for like. Maybe I am expecting too much from a body that cost half the price of the K10D.

My k10d died yesterday. Today I decided to get a replacement. Not enough funds for the k7 so the choice was used k20 $430 or kx special offer $420. Got the KX good price. Used my new toy today. faster fous, better awb znd focus seemed accurate but when looked at the raw files in lightroom it seemed that they did not have as much detail as images taken with my k10d, Maybe it is too soon to make this judgement and there could be other factors so i am asking if anyone else is of the same opinion