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The probem with the low cost CCDs are chip size and fairly low resolution in OSC versions. Your 1100D with 12.2 megapixels at 5.19 size is going to give you good performance in the APS-C sensor size. To get the equivalent in a CCD your going to be spending close to $3k for something new. For example, look at the ATIK 383L colour version which is only 8 megapixels at a min of $2k USD on sale add exchange rates and GST. Check Andrews prices for local prices near $3k. Sure the CCD fans will argue about Quantum Efficency, cooling etc but is tgat going to be worth the price to you. If you mod your 1100D for full spectrum and cooling , you improve it significanty, at low cost. I went through this very research last year and coud not justify the cost of CCD at this time. I am buiding a mono full spectrum cooled dslr right now for narrowband imaging. You can get a lot more out of your 1100D but I realise the lure of the CCD is strong.
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