New to AP. 50% of my photos have an odd discoloration. What am I doing wrong?

[jdmccourt]

Half of of my night shots have a green haze/discoloration to them. This discoloration seemingly appears at random although it is only night shots. Never had an issue during the day. Maybe a sensor issue during longer exposures? It happens on several of my lenses. It has occurred anywhere from 8 seconds to 120 second exposures. I can also take 8 or 120 second exposures with no discoloration. It seems completely random.

Cant find any information anywhere on this.

These shots were done on a 450d i bought used a couple months ago. At this point I assume I just need a new camera. I have also recently updated the cameras firmware but haven't been able to take any more shots due to weather.

I am new to photography in general. I thought possibly the cold weather for awhile but I live in AZ and from my understanding, 40 degree nights would have zero affect on a camera.

Any information would be greatly appreciated!

 

[rnclark]

Half of of my night shots have a green haze/discoloration to them. This discoloration seemingly appears at random although it is only night shots.

What you are observing is real. It is called airglow. The green is oxygen emission.

See: http://www.clarkvision.com/articles/color.of.the.night.sky/

Roger

Never had an issue during the day. Maybe a sensor issue during longer exposures? It happens on several of my lenses. It has occurred anywhere from 8 seconds to 120 second exposures. I can also take 8 or 120 second exposures with no discoloration. It seems completely random.

Cant find any information anywhere on this.

These shots were done on a 450d i bought used a couple months ago. At this point I assume I just need a new camera. I have also recently updated the cameras firmware but haven't been able to take any more shots due to weather.

I am new to photography in general. I thought possibly the cold weather for awhile but I live in AZ and from my understanding, 40 degree nights would have zero affect on a camera.

Any information would be greatly appreciated!

 

[aramgrg]

Half of of my night shots have a green haze/discoloration to them. This discoloration seemingly appears at random although it is only night shots.

What you are observing is real. It is called airglow. The green is oxygen emission.

See: http://www.clarkvision.com/articles/color.of.the.night.sky/

Roger

I don't think the OP talks about oxygen emission though. Upon careful examination, the images show amp glow, which seems to be the concern of OP. In that case, I'll point to another article, with your permission, of course

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www.clarkvision.com

 

[jdmccourt]

Half of of my night shots have a green haze/discoloration to them. This discoloration seemingly appears at random although it is only night shots.

What you are observing is real. It is called airglow. The green is oxygen emission.

See: http://www.clarkvision.com/articles/color.of.the.night.sky/

Roger

I don't think the OP talks about oxygen emission though. Upon careful examination, the images show amp glow, which seems to be the concern of OP. In that case, I'll point to another article, with your permission, of course
http://www.clarkvision.com/articles/evaluation-1d2/

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https://www.flickr.com/photos/aramgrg/

It looks like it was amp glow. Spent some time looking it up and it appears that all I needed to do was turn off live view before pressing the shutter. Took 15 60 second exposures with no live view and there was no green haze/glow at the bottom of any frame. I took 1 30 second shot with live view on and there it was.

Thank you for the help! This has been irritating me for quite awhile.