Quote:
Originally Posted by pixair
I'm thinking to buy ASI1600 for my 12" newtonian telescope. Will this combo be good match? I'm not worry about mount (ASA DDM) but image scale 0.67arcsec/pixel sounds way to much (I have average seeing 2.5"-3"). My main targets are galaxies and some narrowband (but only in Ha).
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An image scale of 0.67 arcsec/pixel will be well sampled for seeing just under 2.5" (image scale * 3.5 is the magic number:
http://www.stanmooreastro.com/pixel_size.htm)
I image at that scale with my Ceravolo 300 (same aperture as you) and it works well for galaxies but you do need reasonably long integration times. You'll need good guiding but I expect the DDM is capable of that.
The other thing you might want to consider is whether the ASI1600 will give you a FOV that's large enough for the narrowband nebula targets you want to go after.
Cheers,
Rick.