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03-12-2011, 01:08 PM   #1
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What is an acceptable rate of hot pixels for a new K-r?

Hi guys,

I just got a new K-r from buydig. I did a deadpixel test on it and found out a few hot pixels. I am wondering whether it's common or should I return for a replacement.

I have disabled noise reduction and shake reduction.

Here is the test result:

exposure 4", ISO 1600, FNumber 4.0 --- 10 hot pixels: 63,91,112,86,67,62,110,63,65,68 (luminance)

exposure 2", ISO 800, FNumber 3.5 --- 2 hot pixels:
84, 78 (luminance)

exposure 1/60", ISO 1600, FNumber 4.0 --- 234 pixels over 20.

My problem is that there are 2 "hottest" pixels are all in the fixed locations.
Do you think it will worth it to ask for an exchange?

Thank you!

03-12-2011, 03:01 PM   #2
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QuoteOriginally posted by huh Quote
Hi guys,

I just got a new K-r from buydig. I did a deadpixel test on it and found out a few hot pixels. I am wondering whether it's common or should I return for a replacement.

I have disabled noise reduction and shake reduction.

Here is the test result:

exposure 4", ISO 1600, FNumber 4.0 --- 10 hot pixels: 63,91,112,86,67,62,110,63,65,68 (luminance)

exposure 2", ISO 800, FNumber 3.5 --- 2 hot pixels:
84, 78 (luminance)

exposure 1/60", ISO 1600, FNumber 4.0 --- 234 pixels over 20.

My problem is that there are 2 "hottest" pixels are all in the fixed locations.
Do you think it will worth it to ask for an exchange?

Thank you!
Sorry, bit I do not think that having a few hot pixels justifies a return... you do however have a 30 day warranty most likely to get your money back. do you really think you will notice that in real world shooting?
03-12-2011, 03:16 PM   #3
huh
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Original Poster
QuoteOriginally posted by mp29k Quote
Sorry, bit I do not think that having a few hot pixels justifies a return... you do however have a 30 day warranty most likely to get your money back. do you really think you will notice that in real world shooting?
My concern is mainly about the 2 "hotter" pixels. Is there possibility that they become dead pixels after a while?
03-12-2011, 04:18 PM   #4
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Have you tried pixel mapping in the menu? Or do you use any post processing software? Lightroom automatically takes them out. You will find some hot pixels in most modern cameras. So long as they don't like like the stars in the night sky you should be okay.

03-13-2011, 08:46 AM   #5
huh
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Join Date: Feb 2011
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The two hot pixels are on the top center of the sensor. They won't show up for regular photos but they do become quite noticeable when I tested a few moon shots last night. PP definitely took care of them, but I still want to know whether it's quite normal with new pentax cameras.
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