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09-27-2013, 11:25 AM   #1
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K-30: hot pixels in long exposures?

I'm thinking of upgrading from my K200D to a K30. While I've generally been pleased with my K200D, it seems to produce a lot of hot pixels in long exposures (anything > 5-10 seconds), even with the long-exposure NR turned on (if the long-exposure NR is turned off, then it's REALLY bad). I know hot pixels are inevitable in long exposures, but it seems like they are really excessive in my K200D. I take a lot of lightning and storm photos in low light and end up needing to PP them out, which is time consuming. Simply doing a "despeckle" in PP doesn't work because this takes out some of the lightning! Does anybody have experience with long exposures on the K30 that can set my mind at ease on this issue? Thanks in advance.

09-27-2013, 11:27 AM   #2
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Have you tried pixelmapping?
09-27-2013, 11:41 AM   #3
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No, but isn't that for when you have a hot pixel all the time? These show up in long exposures and get progressively worse with longer exposures.
09-27-2013, 11:52 AM   #4
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Doesnt post processing software automatically remove them?
Are you in a very hot place, or have you been using the camera in live view for a long time?

I dont have the K-30, but my K-r and K-01 dont usually have problems with hot pixels even with 30 sec exposures. (+slow shutter NR, which essentially doubles the exposure time, only the added half is with closed shutter) Hope someone else chimes in, Im pretty sure there are some long exposure photographers with K-30s here


Last edited by Na Horuk; 09-27-2013 at 12:13 PM.
09-27-2013, 12:06 PM   #5
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QuoteOriginally posted by mconwxdr Quote
I'm thinking of upgrading from my K200D to a K30. While I've generally been pleased with my K200D, it seems to produce a lot of hot pixels in long exposures (anything > 5-10 seconds), even with the long-exposure NR turned on (if the long-exposure NR is turned off, then it's REALLY bad). I know hot pixels are inevitable in long exposures, but it seems like they are really excessive in my K200D. I take a lot of lightning and storm photos in low light and end up needing to PP them out, which is time consuming. Simply doing a "despeckle" in PP doesn't work because this takes out some of the lightning! Does anybody have experience with long exposures on the K30 that can set my mind at ease on this issue? Thanks in advance.
As long as you have Slow Shutter Speed NR set to Auto or On, the K-30 give amazingly clean night time shots.
09-27-2013, 12:39 PM   #6
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QuoteOriginally posted by mconwxdr Quote
I'm thinking of upgrading from my K200D to a K30. While I've generally been pleased with my K200D, it seems to produce a lot of hot pixels in long exposures (anything > 5-10 seconds), even with the long-exposure NR turned on (if the long-exposure NR is turned off, then it's REALLY bad). I know hot pixels are inevitable in long exposures, but it seems like they are really excessive in my K200D. I take a lot of lightning and storm photos in low light and end up needing to PP them out, which is time consuming. Simply doing a "despeckle" in PP doesn't work because this takes out some of the lightning! Does anybody have experience with long exposures on the K30 that can set my mind at ease on this issue? Thanks in advance.
I shot some 30s photos with the K-50 last week and it didn't have any hot pixel issues. The CCD in the K200D might be the problem.

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09-27-2013, 01:03 PM   #7
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Hot pixel removal algorithms often remove good pixels near the lightning in my shots. I'm hoping it's just the CCD in the K200D and the CMOS in the K30 no longer has this issue. So far so good with the feedback!
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