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Old Aug 22, 2006, 10:03 PM   #1
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I just received my *ist DL and on soem images I have noticed a pixel that seems to be stuck red. It seems to mee that the sensor has a defective pixel.


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Old Aug 22, 2006, 10:46 PM   #2
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Here is a second example which is perhaps abit better...




I purchased the camera at buydig... Hopefully I can get them to crosship if I pay for the item that is being sent out as if it was a new order. Anyone have any experience or ideas for me? I really need this cam for a project this friday, and ofcoarse I had a problem.
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Old Aug 22, 2006, 11:47 PM   #3
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If you need the camera for this Friday use it and clone out the faulty pixel before worring about returning the camera.


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Old Aug 23, 2006, 2:02 AM   #4
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Hi vulcan,

You probably won't agree with my opinion, but I'll give it anyway. I don't worry about dead or hot pixels in my DS -- never did a test -- probably never will -- and I'm going on 25,000 images on this body. I'm going to assume that I have a bunch, but I don't see them and I usually do a good deal of PP at over 150% view. I don't expect absolute perfection in anything that I buy since it's a manufactured product and there has to be a level of "defects" that still pass QC as acceptable. I calculate 1 out of 6,100,000 as a pretty small percentage.

I'd think of myself as lucky that it's only one. I would also think about what Pentax might consider acceptable. What if they exchange the camera and the replacement has 4 stuck pixels, and you exchange that for another and it has 3. Disgruntled and angry after paying for return shipping three times, and being without a camera for a month, you decide that Pentax isn't worth it so this time you exchange it for an XXX brand camera -- and who knows what that mfg's acceptable levels in QC are. . . and the 1 red pixel would start to look pretty good. . .

Mike Muizebelt (Mousehill on the DPR forum) just counted his after 15,000 shots on his DS and he has 18. Has it effected his images? Judge for yourself at :

http://www.macro-photo.eu/

JensR has 50 after over 32,000 shots on his DS. Check out his site at :

http://www.jr-worldwi.de/photo/index.html

There were others who posted counts, but these guys are GOOD, and have accepted the inevitable.

There are programs available on the web that find hot pixels and eliminate them automatically. One that is supposed to work well is Flameout -- $14.95 (with a free 30-day trial at:

http://www.nightwatchsoftware.com/flam/flam.htm

If you plan on shooting RAW and use ACR, it elimnates them on conversion automatically.

Stuck pixels are the nature of the beast, and sooner or later you'll have to deal with them. IMO, if you choose to either ignore it or deal with it now, you'll probably save yourself a lot of frustration later.

. . . but that's just me. . .

Scott
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Old Aug 23, 2006, 9:13 AM   #5
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I never had any constant dead or hot pixels with my old camera, and I don't see why I should begin accepting them ar okay now. The fact is I didn't need to do a test. I noticed them right away in the first few images I took.
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Old Aug 23, 2006, 10:15 AM   #6
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Hi vulcan,

I said that I thought you wouldn't agree -- to each his own.

Hope you can get it resolved to your satisfaction.

Scott
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Old Aug 23, 2006, 11:38 AM   #7
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I took a few more pictures...

I'll just provide link since they are full size.

http://www.vulc4n.com/images/test3.jpg
http://www.vulc4n.com/images/hicont.jpg [modified to increase contrast]

I count no less then 10 hot pixels.
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