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Does hot pixel is a result of long exposure cause hot pixels in photos?

Today, I was taking some shots of night sky. For each, I had 20 sec exposure. During picture review, I found a red dot which seems whichis referred as "Hot Pixel" according to some people on the Internet term as "hot pixel". Because I found this red dot with 20 sec exposures (which I took for the first time to capture the night sky) and not with the normal shots, I thought to test if this was a result of long exposure. To test this, I took two shots with lens cap on. One was with 20 sec exposure and another one with 1 sec exposure. I found the red dot again with 20 sec exposure but none with 1 sec exposure.

Additional info: Camera : Canon 600D, ISO : 200 - 800, White Balance : Tungsten, Auto and Fluorescent.

Hot pixel with long exposure, 20 sec (crop out from the night sky shot):

Hot pixel with long exposure (20 sec)

My question is, does this red dot/hot pixel is a result of long exposure or something else (sensor processing etc)?

Also, how to reduce or remove this effect as it seems very annoying for the astro-photography (initially, I got confused with it as a star with red shift)?

Thanks in advance!

Does hot pixel is a result of long exposure?

Today, I was taking some shots of night sky. For each, I had 20 sec exposure. During picture review, I found a red dot which seems which some people on the Internet term as "hot pixel". Because I found this red dot with 20 sec exposures (which I took for the first time to capture the night sky) and not with the normal shots, I thought to test if this was a result of long exposure. To test this, I took two shots with lens cap on. One was with 20 sec exposure and another one with 1 sec exposure. I found the red dot again with 20 sec exposure but none with 1 sec exposure.

Additional info: Camera : Canon 600D, ISO : 200 - 800, White Balance : Tungsten, Auto and Fluorescent.

Hot pixel with long exposure, 20 sec (crop out from the night sky shot):

Hot pixel with long exposure (20 sec)

My question is, does this red dot/hot pixel is a result of long exposure or something else (sensor processing etc)?

Also, how to reduce or remove this effect as it seems very annoying for the astro-photography (initially, I got confused with it as a star with red shift)?

Thanks in advance!

Does long exposure cause hot pixels in photos?

Today, I was taking some shots of night sky. For each, I had 20 sec exposure. During picture review, I found a red dot which is referred as "Hot Pixel" according to some people on the Internet. Because I found this red dot with 20 sec exposures (which I took for the first time to capture the night sky) and not with the normal shots, I thought to test if this was a result of long exposure. To test this, I took two shots with lens cap on. One was with 20 sec exposure and another one with 1 sec exposure. I found the red dot again with 20 sec exposure but none with 1 sec exposure.

Additional info: Camera : Canon 600D, ISO : 200 - 800, White Balance : Tungsten, Auto and Fluorescent.

Hot pixel with long exposure, 20 sec (crop out from the night sky shot):

Hot pixel with long exposure (20 sec)

My question is, does this red dot/hot pixel is a result of long exposure or something else (sensor processing etc)?

Also, how to reduce or remove this effect as it seems very annoying for the astro-photography (initially, I got confused with it as a star with red shift)?

Thanks in advance!

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Nitin Kumar
Nitin Kumar
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Does hot pixel is a result of long exposure?

Today, I was taking some shots of night sky. For each, I had 20 sec exposure. During picture review, I found a red dot which seems which some people on the Internet term as "hot pixel". Because I found this red dot with 20 sec exposures (which I took for the first time to capture the night sky) and not with the normal shots, I thought to test if this was a result of long exposure. To test this, I took two shots with lens cap on. One was with 20 sec exposure and another one with 1 sec exposure. I found the red dot again with 20 sec exposure but none with 1 sec exposure.

Additional info: Camera : Canon 600D, ISO : 200 - 800, White Balance : Tungsten, Auto and Fluorescent.

Hot pixel with long exposure, 20 sec (crop out from the night sky shot):

Hot pixel with long exposure (20 sec)

My question is, does this red dot/hot pixel is a result of long exposure or something else (sensor processing etc)?

Also, how to reduce or remove this effect as it seems very annoying for the astro-photography (initially, I got confused with it as a star with red shift)?

Thanks in advance!