Distracting line

Hello,

I've got following problem with my K100D. There are some hot pixels on my sensor, but that's not the main problem. There's distracting line in upper part of picture. This occurs when photographing in ISO 3200 or 1600 at night. It looks like "line of increased noise" in picture.
My questions:
1. What could be the problem?
2. Is the amount of noise in this picture normal?

http://www.imageno.com/930mo7j1zptepic.html

T 1/10
F 3,5
ISO 3200
RAW
Landscape program

Thanks for your opinions!

Hi and welcome, I can't find the hot pixels, thought I had but with perseverance managed to scrape them off my monitor. Can see the line though and I can only offer the tale of a problem I had. Same problem on a camera of mine except it was up and down not across, it turned out to be a hair, had my hair cut and solved the problem, if it is a hair it may be trapped somewhere in lens or camera.

I would expect this amount of noise from a 6MP sensor at Iso3200, is this shot a crop or straight from the camera?

Sorry yes, the noise, looks about right for ISO that high but not the line, that is not right.

Thordell: The hair has to be pretty straight and aligned on the sensor Yes, you are right, hot pixels are not visible on this picture.

ttk: Of course, image is crop. Picture was originally taken to RAW format.

Thank you for your comments.

You can convert from Raw to Jpeg/Tiff without cropping that's why I asked what does the shot look like without the crop.

Banding, not really uncomming I believe or is it something else?

Banding noise is highly camera-dependent, and is noise which is introduced by the camera when it reads data from the digital sensor. Banding noise is most visible at high ISO speeds and in the shadows, or when an image has been excessively brightened. Banding noise can also increase for certain white balances, depending on camera model.

Although fixed pattern noise appears more objectionable, it is usually easier to remove since it is repeatable. A camera's internal electronics just has to know the pattern and it can subtract this noise away to reveal the true image. Fixed pattern noise is much less of a problem than random noise in the latest generation of digital cameras, however even the slightest amount can be more distracting than random noise.

In images taken at night perhaps it could be flare, but in this instance flare across a line of pixels. We do see a similar effect on the screen of compact cameras where bright light sources cause horizintal or vertical purple lines.

I get horizontal lines on my K100D at high ISO, so I don't shoot at high ISO.

Sure you are right but don't dismiss the hair without looking, mine gave the same results except for the orientation and it was a hair.

If it only happens at the very high ISO then perhaps you could avoid them or allow so you can crop.

It just might be one of the auto features failing in low light. You could try turning them all off: Shake-reduction, autofocus, select manual exposure and see what happens
(you can use the exif from a previous pic to get values)