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FORUMS Community Talk, Chatter & Stuff General Photography Talk 
Thread started 25 Sep 2016 (Sunday) 11:36
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Hot Pixel Question

 
canongear
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Sep 25, 2016 11:36 |  #1

I did some daytime bulb exposures the other day and I've noticed a red pixel in the same area of different images.
The pixel is red in colour which based on what I've read, is considered a hot pixel when doing bulb exposures.

I've also read that Photoshop should remove hot pixels when the image is imported.
I'm finding that isn't the case.
It may not be as noticeable but, when I zoom in on the image, it is quite noticeable.
I'm using Photoshop CC.

I was viewing the images using Canon ZoomBrowser when I first noticed the red pixel.

This red pixel showed up on different images with a shutter speed of 3 seconds or slower, aperture of 4 or 8 and ISO of 100 or 400.
Was using a Canon 6D with a CPL and a 10 stop ND filter when doing the bulb exposures.

Is this normal or should the red pixel be completely eliminated after being imported into Photoshop CC?




  
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Left ­ Handed ­ Brisket
Combating camera shame since 1977...
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Sep 25, 2016 11:47 |  #2

I believe your best bet is to let the camera map the hot pixel with long exposure NR. but I think there is another way to do it that is for permanent stuck pixels.

Does it only happen with long exposures?


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canongear
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Sep 25, 2016 12:20 |  #3

Left Handed Brisket wrote in post #18139918 (external link)
I believe your best bet is to let the camera map the hot pixel with long exposure NR. but I think there is another way to do it that is for permanent stuck pixels.

Does it only happen with long exposures?

Yes.
I just noticed the hot pixel today so, I am going to try the 1 minute manual sensor cleaning trick with the lens cap on and see if that gets rid of the hot pixel.
I plan on doing some shooting tomorrow so, I'll find out if that worked.




  
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Left ­ Handed ­ Brisket
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Sep 25, 2016 13:27 |  #4

Long Exposure NR is your friend.


PSA: The above post may contain sarcasm, reply at your own risk | Not in gear database: Auto Sears 50mm 2.0 / 3x CL-360, Nikon SB-28, SunPak auto 322 D, Minolta 20

  
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Hot Pixel Question
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