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Eric, that link is very interesting, it seems the 14bit dynamic range and lower noise of the 40D sure makes it look attractive for Astro. From what I can tell tho, it seems a shame he didnt show/test an image at 1600 ISO.
The 16bit dynamic range, high QE and low noise of cooled astro CCD cams is what makes them de riguer for serious astro, but a cooled moded 14bit 40D, despite the relatively low QE, would make them serious contenders for astro pics against CCDs for a lot less money, especially given the hi res. Res like that cost a bomb in CCDs. We live in interesting times, the next gen hi res 16bit CMOS DSLRs will be very attractive, if they can lower the noise even more (and without cooling, thats hard with CCDs) and up the QE. Cooled multi mega pixel CCDs arnt that flash in the QE department anyway (30% typical).
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