Ultimately, what do bad pixels mean?

MrThallid · 08-25-2013, 05:20 PM

Please review my gallery images, particularly the night shot. I have about 8 or 12 bright spots that I believe to be "dead" pixels. Is this a repair-able defect? With ~23000 shutter count, I have gotten a ton of use out of my trusty K-x, I was just wondering about the dead pixels.

MrThallid's Album: 1st Annual Festival of Color - PentaxForums.com

RollsUp · 08-25-2013, 06:07 PM

The K-x supports dead pixel mapping. The supplied manual has instructions on how to enable it. Software like Lightroom automatically removes the dead pixels too.

elliott · 08-25-2013, 08:26 PM

Those don't seem to be bad pixels, just hot pixels caused by long exposure, even new cameras have those and it is not a defect.

MrThallid · 08-28-2013, 09:02 AM

thank you for the replies. I will try the dead pixel mapping and see what happens, but the explanation of hot pixel on long exposure makes sense.

Deedee · 08-28-2013, 12:26 PM

Hey,

Where do you see the dead pixels could you explain. I can't see ONE!.

Regards

MrThallid · 08-29-2013, 06:15 AM

Originally posted by Deedee

Hey,

Where do you see the dead pixels could you explain. I can't see ONE!.

Regards

They may be better visible in the flickr gallery...
Grayslake 1st Annual Color Aloft Balloon Festival - a set on Flickr

there are 4 or 6 in the sky area and a few mid picture and into the field area.

elliott · 08-29-2013, 08:09 AM

Looking at this one, half a second at 800ISO, I'm definitely saying run of the mill hot pixels, especially if it was a hot day. I believe Flickr must have stripped some EXIF data, because I don't see temperature listed.

08-25-2013, 05:20 PM	#1
MrThallid New Member Join Date: Feb 2011 Location: North Chicago 'burbs Photos: Gallery \| Albums Posts: 24	Ultimately, what do bad pixels mean? Please review my gallery images, particularly the night shot. I have about 8 or 12 bright spots that I believe to be "dead" pixels. Is this a repair-able defect? With ~23000 shutter count, I have gotten a ton of use out of my trusty K-x, I was just wondering about the dead pixels. MrThallid's Album: 1st Annual Festival of Color - PentaxForums.com

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08-25-2013, 06:07 PM	#2
RollsUp Veteran Member Join Date: Apr 2008 Location: AK USA Photos: Gallery Posts: 1,766	The K-x supports dead pixel mapping. The supplied manual has instructions on how to enable it. Software like Lightroom automatically removes the dead pixels too.

08-25-2013, 08:26 PM	#3
elliott Inactive Account Join Date: Dec 2008 Location: North Carolina Photos: Albums Posts: 1,720	Those don't seem to be bad pixels, just hot pixels caused by long exposure, even new cameras have those and it is not a defect.

08-28-2013, 09:02 AM	#4
MrThallid New Member Join Date: Feb 2011 Location: North Chicago 'burbs Photos: Gallery \| Albums Posts: 24 Original Poster	thank you for the replies. I will try the dead pixel mapping and see what happens, but the explanation of hot pixel on long exposure makes sense.

08-28-2013, 12:26 PM	#5
Deedee Veteran Member Join Date: May 2013 Posts: 307	Hey, Where do you see the dead pixels could you explain. I can't see ONE!. Regards

08-29-2013, 06:15 AM	#6
MrThallid New Member Join Date: Feb 2011 Location: North Chicago 'burbs Photos: Gallery \| Albums Posts: 24 Original Poster	Originally posted by Deedee Hey, Where do you see the dead pixels could you explain. I can't see ONE!. Regards They may be better visible in the flickr gallery... Grayslake 1st Annual Color Aloft Balloon Festival - a set on Flickr there are 4 or 6 in the sky area and a few mid picture and into the field area.

08-29-2013, 08:09 AM	#7
elliott Inactive Account Join Date: Dec 2008 Location: North Carolina Photos: Albums Posts: 1,720	Looking at this one, half a second at 800ISO, I'm definitely saying run of the mill hot pixels, especially if it was a hot day. I believe Flickr must have stripped some EXIF data, because I don't see temperature listed.