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Old 12-08-2010, 02:38 PM
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renormalised (Carl)
No More Infinities

renormalised is offline
Join Date: Apr 2008
Location: Townsville
Posts: 9,698
Even though it is quite a bit dearer, I'd go for the OSC. Why, because it has a better dynamic range spectrum wise, better QE, far less hot pixels, less dark current, higher full well and it's already cooled. Pixels aren't as small as the DSLR's but you'll be able to use it on a wider range of scopes than the DSLR because of that. One good thing about the can run it off batteries. The ST needs a power supply, which means extra cables/cords to deal with.

To be very useful for solar observing, you'll have to mod the 550D so it can pick up the Ha from the Sun, which means extra money spent and more time wasted waiting for it to be modded.

Mind you, 18 megs a pickle versus 8.3, it's a bit of a choice!!!.
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