kx images soft?

kiwao
Posted 23/07/2010 - 15:54 Link
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
k5iis , 77mm ltd, 135mm f3.5 M, A35mm-105mm f3.5 zoom,17-50 sigma, k135mm f2.5, 43mm Ltd, DA*200mm.
johnriley
Posted 23/07/2010 - 16:21 Link
Every new camera will maybe need slightly different tweaks to get the best out of it. Maybe adjust the in-camera sharpening to +1 and see if that helps.

The real test will be the final image after sharpening in Photoshop or similar.
Best regards, John
Tobio
Posted 23/07/2010 - 16:45 Link
I'm sorry for your loss kiwao. You could send a 100 % crop sample of a part of one image for us to see.
Best regards,
Tobio

K20d with Tamron AF 90mm f/2.8 Di SP macro , smc da 18-55 mm, smc da 50-200 mm and smc da 55-300 mm + Metz 58 af-1. Editing with Pentax Photolab, Gimp and Paint.net.
Anvh
Posted 23/07/2010 - 17:30 Link
Don't forget the sensors are very different.
The K-X has a CMOS sensor and a bit more pixels, at lower ISO's the K10D will be sharper when looking at 100% pixel zoom, it can be just the difference in the sensor.
With the K10D the optimum ISO was 100 and 200 with the K-X it's closer to the 400 so use a range between 200 and 400 to get the most out of the K-X.
Stefan
Comment Image

K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
kiwao
Posted 23/07/2010 - 22:14 Link
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.
k5iis , 77mm ltd, 135mm f3.5 M, A35mm-105mm f3.5 zoom,17-50 sigma, k135mm f2.5, 43mm Ltd, DA*200mm.
kiwao
Posted 24/07/2010 - 09:53 Link
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.???
k5iis , 77mm ltd, 135mm f3.5 M, A35mm-105mm f3.5 zoom,17-50 sigma, k135mm f2.5, 43mm Ltd, DA*200mm.
Anvh
Posted 24/07/2010 - 12:07 Link
kiwao wrote:
The files are raw. The camera was up for srgb so I'll change to adobe rgb.
Colour space doesn't matter with RAW because it doesn't have one

kiwao wrote:
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?
That's not fully true, the sensors are very different in terms off design, CCD is better in some aspects and the CMOS in others.

Here is a review about the K-X vs the K-7 sensor link
This was said.
Therefore, the K-x sensor outperforms the K-7 in low light situations whereas the K-7 outperforms the K-x in good light. This is further confirmed by the better resolution and more artifact-free images from the K-7.
Stefan
Comment Image

K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
JohnX
Posted 24/07/2010 - 12:21 Link
kiwao wrote:
..so shouldn't the raw image quality be the same?
If you're comparing Raw vs Raw, then I would think so, if not better with the Kx.

As always with this Forum, the best help comes when you can post examples.
Anvh
Posted 24/07/2010 - 12:59 Link
kiwao wrote:
..so shouldn't the raw image quality be the same?
I've read over that part.
If you mean the quality of the file system then yes most likely but the capture quality of the sensor is different though.
Stefan
Comment Image

K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
Edited by Anvh: 24/07/2010 - 13:01
MrCynical
Posted 24/07/2010 - 15:43 Link
kiwao wrote:
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.???
Try taking test shots on a tripod, using mirror lockup. It might just be possible (and I'm clutching at straws here, because as people say above the Kx should at least equal the K10) that your technique hasn't adjusted to the much lighter body yet? That would explain why you notice the problem more on the FA77, since with the much narrower depth of field any camera movement issues would be much more visible.
kiwao
Posted 25/07/2010 - 16:03 Link
MrCynical wrote:
[ your technique hasn't adjusted to the much lighter body yet? That would explain why you notice the problem more on the FA77, since with the much narrower depth of field any camera movement issues would be much more visible.
This is a good point and could be the reason.

Anvh wrote:
Here is a review about the K-X vs the K-7 sensor link
This was said.
Therefore, the K-x sensor outperforms the K-7 in low light situations whereas the K-7 outperforms the K-x in good light. This is further confirmed by the better resolution and more artifact-free images from the K-7.
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.
k5iis , 77mm ltd, 135mm f3.5 M, A35mm-105mm f3.5 zoom,17-50 sigma, k135mm f2.5, 43mm Ltd, DA*200mm.
kiwao
Posted 27/07/2010 - 03:44 Link
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.
k5iis , 77mm ltd, 135mm f3.5 M, A35mm-105mm f3.5 zoom,17-50 sigma, k135mm f2.5, 43mm Ltd, DA*200mm.
Pentaxophile
Posted 27/07/2010 - 08:07 Link
OMG that's terrible bad luck!

I'm sure the k20d will prove just as good a choice as the k-x though, in the end.
kiwao
Posted 29/07/2010 - 06:03 Link
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
k5iis , 77mm ltd, 135mm f3.5 M, A35mm-105mm f3.5 zoom,17-50 sigma, k135mm f2.5, 43mm Ltd, DA*200mm.
Edited by kiwao: 29/07/2010 - 06:25

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