Kr Sensor Marks?

I bought a Kr yesterday and had a test. Then I found the same problem with the K5 sensor. I made the mirror up and found no dusts.
[IMG]http://i861.photobucket.com/albums/ab175/kevin4betsy/Camera%20Lens/Kr1.jpg[/IMG]

Should I return it and ask for an exchange? Do any Kr owners have the same issues?

Regards,
Liang

Could be dust which you can't quite see. That doesn't look problematic to me, the spots are tiny and not patterned. Looking at thread on the other forum, Falk Lumo checked his K-7 and found a couple of suspect marks apparently under the AA filter - he had presumably not noticed them until this issue became prominent with K-5s.

You have to make a disinction between the occasional spot which might inevitably appear as part of the manufacturing process, and which will not affect images in any meaningful way, and the patterns and clusters of spots K-5 owners are seeing.

Have you done a test for dust in the dust alert in camera menu ?.
Ian

I think it could be also dust under AA filter as I tried to clean it with dust removal and sensor clean.

Manufacturers could have avoid these kind of issues if they had a superb QC. They could pay more attention to the key product(sensor - though it's not made by Pentax).

The trouble is that no-one wants to pay for that these days. If every camera was rigorously tested then the price would soar. I assume that they are batch-tested and as long as faults fall below a certain percentage then that is acceptable.

Yes. If I were manufacturers, I would not pay for that either. Paradox
I've kept persuading me "It's a Kr, not an M9. So it's acceptable".

Leica had dreadful trouble with their sensors and had to supply special filters for all the lenses - up to two free per customer. High price is no guarantee that there will be no faults.

Nearly all QC nowdays is done on a statistical basis with set confidence limits. It actually saves money because they weigh up how long the product's going to last and reduce the quality if it's going to last too long. They also weigh up what percentage is acceptable for returns. Cheaper product more retrurns.

A lot of the QA has been transferred to the people actually building the item or overseeing the process so that less inspectors are needed and it gets the production people more interested in what they are building.

Some highly automated factories have just one man and a dog.... the dogs there so that the man can't destroy the plant

I definitely agree with you. But faults with low price make me feel better. That's why I bought the Kr after cacelling the K5 order.

[IMG]http://i23.photobucket.com/albums/b399/philstaff/krtest2.jpg[/IMG]

[IMG]http://i23.photobucket.com/albums/b399/philstaff/krtest1.jpg[/IMG]

Thought I better do a test did a dust alert test first all clear on that yet when I took a pic on a white card guess what.
Ian

The white card magically turned pink?

Just a party trick of mine.
Ian

I'm sure a lot of k-5 owners would be pleased with that amount of spotting. I have probably got worse dust bunnies on my k-7, if I looked really hard for them

Would you just overlook the specs then or would you notify the place of purchase not sure what to do here.
Ian

I consider mine nominal these are visible f22-f10 on white bachround
but only after f16 in real world images.