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Old Nov 6, 2008, 4:43 PM   #1
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My Sony Alpha A100 had some dark pixels last year, but it was still under warranty, and Sony Repair center fixed it for me.

Last night I noticed that there are some white stuck pixels on each photo. I tried "remapping" feature (as explained in one of the posts, changing month back and forth), but it didn't help.

I took a sample photo with cap on, 2" exposure, noise cancellation on.

Any help is appreciated.

(P.S. the attached photo is cropped on the right side just to make it less than 250400bytes.)
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Old Nov 7, 2008, 8:10 AM   #2
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Are you sure you had Noise Reduction turned on?

That was a 2 second exposure, and it should be taking a dark frame exposure right after the main exposure when shutter speed is longer than 1 second. Then, it should look for any bright pixels in the dark frame exposure and map those locations out in the actual photo.

Are you running Firmware version 1.04? Sony made some changes in how it handles exposures longer than 1 second.

http://esupport.sony.com/CA/perl/new...mp;news_id=150


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Old Nov 7, 2008, 12:34 PM   #3
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Thank you JimC.

I specifically turned the noise reduction on (without it there are even more hot pixels on long exposures).

I'll try the new firmware, didn't know there is one.
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Old Nov 9, 2008, 9:20 PM   #4
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Installed the new firmware. No luck. Sony quoted me a ~$230 price for fixing it.

My next option is to look for software solution to the problem. Idont think there are programs for mapping out bad pixels on the camera, but I am hoping some Windows PC program should be available.

Any suggestion is very welcome.

Thanks.
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