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Image banding
G'day,
Does anyone know what causes this banding/streaking in images? (and how to get rid of it).
Cenralds cooled 60d. about 60 x 45 secs. ISO 1000. IDAS LPS filter.
(+flats, darks and bias).
Ambient temp = 8C, Camera Temp = -15C.
Images taken as JPEG and converted to 16 bit TIFF. (I know I should take RAWs).
The image I took just before this one had a little banding - but nowhere near as much as this one.
I thought it may be noise related but it doesn't happen every time. I seem to get it on images of fairly sparse areas like this one. The temperature was low enough - I wouldn't expect noise to be that much of a problem?
Also, despite the low subs and overall time, the image seems particularly faint. Is it caused by DSS? I often take 40 - 60 minute total exposure time and I get better images than this. (I also occasionally used to get this type of banding with my 550d which isn't cooled).
(Don't worry about the star shapes etc. - that's another issue).
Any suggestions appreciated.
Regards,
Tony.
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