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04-27-2008, 07:54 PM   #1
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Hot pixel on K100D? Please look and help

Hi, I'm posting this for a friend with a K100D. I know the two shots below are kinda rough but they show the problem. The first is a very tight crop of what is suspected to be a hot pixel. The second is a (resized) full size image (although very grainy) but you can see the hot pixel in the center of the frame. He says this occurrs with every photo he takes. High ISO photos seem to show the issue more. Should I tell him to take his camera in for repair?

Last edited by Mr Hyde; 01-21-2013 at 08:33 PM.
04-27-2008, 08:11 PM   #2
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I think so. Is the camera under warranty? Pentax will map out the dead pixels and eliminate them.

I've heard that you can program Lightroom and PS to automatically fix the spot each time but as I don't own those programs, I'm not sure if that's possible.
04-27-2008, 08:16 PM   #3
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I had a couple on my k100 super and one was right in the middle and it bugged me so I sent it in for remapping. If it's under warranty it won't cost anything but to mail it. I'd guess most sensors have a couple of them.
04-27-2008, 10:38 PM   #4
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So this is a fairly common occurence? Is this a Pentax problem or a problem with digital imaging sensors in general? I just took a look at all my high ISO pictures and sure enough I have a couple purple and green pixels all in the same spots. Lower ISO shots do not show these pixels. Is this problem known for popping up in high ISO pictures only?

04-27-2008, 11:07 PM   #5
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Yes it is and not specific to Pentax. It can be seen in LCD monitors and imaging devices from the cheapest to the most expensive. I don't know why but it seems more noticable in high ISO shots.
04-28-2008, 12:25 AM   #6
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I had similar with my k100d, it went back to Pentax and came back still with the dead pixel. ! furious. (sent back underwaranty via Jessops, UK)

Second time they had for 2 weeks and it came back with a new main board and new ccd sensor. and is perfect now
04-28-2008, 10:24 AM   #7
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My K100D Super has a couple, but one has to zoom in to the image at 1:1 on a screen to find them, and even then, only in certain lighting.

I decided if I have to go hunting in PS for 10 minutes at pixel-level zoom to find the minuscule flaws, they're not worth caring about. Besides, Camera RAW does seem to map them out.
04-28-2008, 01:27 PM   #8
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I have 4 dead pixels on my new k100d super but it only shows up on high iso and when viewed 1:1. i'd probably send it to pentax when my warranty is about to expire and enjoy the camera for now.

04-28-2008, 10:43 PM   #9
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Thanks to everyone who replied. I have passed along your suggestions.

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