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Thanks guys.
Hello Ken, the venerable 314 is a great ccd from the past and the ASI290 is the new back illuminated cmos technology which is so much more sensitive there is no comparison and noise free so cooling makes no difference with fast exposures. 290 has 1e read noise vs 314 3-7e read noise. 290 has such fantastic frame rates we use USB3 and SSD's to cope - I just love the 290!
Regards, John.
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