Canon 40D for Astrophotography with hot pixels?

[iboware]

Hi,

I am new to photography. I did not want to buy a new camera just because I am a newbie. After a bit research, I decided to buy a used 40D from eBay. Today I received my camera, it was physically in perfect condition. It also takes good photos under normal conditions.

What I wanted to do was to take long exposure photos during the night, usually photos of planets and galaxies etc. I put the cap of my camera and I tested the sensor with 1, 10 and 20 seconds. The result was very disappointing. I did two trials with noise reduction enabled and disabled. I am not sure if this is normal. if the camera is defective, I don't want to keep it. Can someone help me please?

These are the results:

https://flic.kr/s/aHskuHic2Q

 

[Skipper494]

Try the Canon forum.

 

[FrankieJ]

Hi,

I am new to photography. I did not want to buy a new camera just because I am a newbie. After a bit research, I decided to buy a used 40D from eBay. Today I received my camera, it was physically in perfect condition. It also takes good photos under normal conditions.

What I wanted to do was to take long exposure photos during the night, usually photos of planets and galaxies etc. I put the cap of my camera and I tested the sensor with 1, 10 and 20 seconds. The result was very disappointing. I did two trials with noise reduction enabled and disabled. I am not sure if this is normal. if the camera is defective, I don't want to keep it. Can someone help me please?

These are the results:

https://flic.kr/s/aHskuHic2Q

Those results are pretty normal.
Use this - http://www.pixelfixer.org/

 

[iboware]

Thanks, I will try it.

Hi,

I am new to photography. I did not want to buy a new camera just because I am a newbie. After a bit research, I decided to buy a used 40D from eBay. Today I received my camera, it was physically in perfect condition. It also takes good photos under normal conditions.

What I wanted to do was to take long exposure photos during the night, usually photos of planets and galaxies etc. I put the cap of my camera and I tested the sensor with 1, 10 and 20 seconds. The result was very disappointing. I did two trials with noise reduction enabled and disabled. I am not sure if this is normal. if the camera is defective, I don't want to keep it. Can someone help me please?

These are the results:

https://flic.kr/s/aHskuHic2Q

Those results are pretty normal.
Use this - http://www.pixelfixer.org/