Weird lines in photo

C

Cook

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Name
Paul
Edit My Images
Yes
I went out last night to give star trails a go. When i finished i looked at some of the images. Towards the end of the images some of them had these weird lines across them. You can see them gradually appear towards the end of the set, but one image might have the lines, the next image might not but the lines would be back again - so its not consistent. When i got back to the car and took dark pictures in the car, the images were fine.

Any ideas why this has happened? It was very cold but it shouldn't cause this right? This is the worst of them:

6715449037_981807680c_z.jpg
 
exif???
 
It's called banding and can have multiple causes, overheating being one of them. It's also usually more apparent in dark/underexposed images.

Do a quick google on your kit and what you were doing with 'Banding' as the first word.
 
Camera Canon EOS 5D Mark II
Exposure 25
Aperture f/4.0
Focal Length 40 mm
ISO Speed 3200
Exposure Bias 0 EV
Flash Off, Did not fire
Orientation Horizontal (normal)
X-Resolution 72 dpi
Exposure Mode Manual
White Balance Auto
Continuous Drive Continuous
Focus Mode Manual Focus (3)
Record Mode JPEG
Canon Image Size Large
Canon Exposure Mode Manual
Lens Type Canon EF 17-40mm f/4L
Short Focal 17 mm
Focal Units 1/mm
Max Aperture 4
Min Aperture 23
Color Tone Normal
Auto ISO 100
Base ISO 3200
Target Aperture 4
Target Exposure Time 25.4
White Balance Auto
Camera Temperature 22 C
Camera Orientation Horizontal (normal)
High ISONoise Reduction Low
Auto Lighting Optimizer Standard
Firmware Version 2.0.9
Canon Model ID EOS 5D Mark II
AFMode Off (Manual Focus)
Lens Model EF17-40mm f/4L USM

I didn't really think that it could have been overheating because it was so cold, about 2 degrees. But then again I've never done star trails or had the camera on continuous for so long!

Cheers peeps :D
 
Multiple 25 second exposures at highish ISO could well cause it.
 
Exif says the camera was at 22 degrees, earlier images (that were fine) were 18 degrees. A friend who was with me with his 5d mkII, shooting at high iso and long exposures had no issues though?
 
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