K7 - strange vertical noise pattern at low ISO (strips)

Started Jul 17, 2009 | Discussions thread
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Marbuel
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K7 - strange vertical noise pattern at low ISO (strips)
Jul 17, 2009

Hi all K7 owners!

Have you noticed a pattern in the K7 noise at low ISO (100-200)? I see vertical "strips" in my low ISO JPGs (straight from camera). At higher magnification it looks like that every second pair of pixel columns is little darker (on average) than a pair next to it. It is visible only at low ISO pictures (usually in blue sky), at higher ISO the pattern is gone.

Here is a crop from an affected image. Original (large, unprocessed) image in a replay.

Any idea what it can be? Do I have bad sensor?
Thanks a lot!
Marek

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