Quote:
Originally Posted by Bassnut
Marc, why do you think the QHY5 would be unsuitable?. Which guide cam then would OK, a video type cam?
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I have a QHY5 - you get reasonably bright stars at 1s exposures. At long FL with the OAG I needed to go to 2s to pick anything. The idea of AO is to image at long FL at the highest frame rate possible so you can do a minimum of 3 corrections per second to compensate for mount errors. And you need at least 7 corrections per second to correct for the seeing. Now I know by experience a QHY5 won't cut it. The SX Lodestar is supposed to be very sensitive even at high frame rates so it makes sense to use one IMHO. Now thinking along those lines why not get the whole SX gear rather than a half assed system 50/50?