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Old 20-04-2011, 08:36 PM
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higginsdj
A Lazy Astronomer

higginsdj is offline
 
Join Date: Mar 2006
Location: Canberra
Posts: 613
Its actually a combination of the 2 but I believe defective columns are the key. I just purchased a new STL1001e and Mike from SBIG was very forthcoming on the type of defects I could expect to see on a Class 2 chip (and defective columns were the key issue). He supplied me with a series of sample images from these cameras so I could gauge the typical position and extent of the errors before I purchased.

If you are taking 'pretty pictures' then these defects are very easy to paint over - more problematic for scientific images though.

Cheers
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