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Hmm
Besides the ripple/ banding issue with the ASI 174 the project success may be in doubt...
To achieve my "fast" requirement I need to operate the camera at around 400 fps. This in turn means that every individual frame must have an exposure of <1/400 sec.....
To achieve a "good to great" signal from the Ha absorption line I find the exposure needs to be probably more like 1/20 sec.
The "fast" SHG option therefore appears to be restricted to very large aperture systems.....
Onwards and Upwards
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