Quote:
Originally Posted by cometcatcher
That's very interesting. There's still a few hot pixels left even at -30C. Goes to show how important cooling is. No wonder my DSLR sensor is horrendous at +30C.
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Of course that
is a 16 Million pixel array... but in comparison the 6 Million pixel H694 has less than half a dozen hot pixels across it's entire surface!!
Quote:
Originally Posted by gvanhau
Very nice result.
How do you compare the performance of the APO against the reflector?
Knowing the cuality of the AP refractors I think it outperforms the AG12 in terms of resolution or am I wrong?
Geert
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I was not expecting it either Geert but after having used both scopes for significant periods now and in mixed conditions across many of the same objects, I can confidently say, yes, the Astrophysics pedigree is indeed top of class but the AG12 even at F3.8 still outperforms it slightly in the overall resolution department, especially under good seeing conditions.
For example
Compare
this AG12 image with
this AP152 image
or
this AP152 image with
this AG12 image
The speed with which the AG12 gathers signal is very noticeably better than the Starfire too.
Quote:
Originally Posted by IanP
Mike, it's beautiful image and exemplary processing !!!
@+30 deg these things produce "Picasso-style" images by themselves ...
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Cheers Ian, yes cooled CCD's are certainly very handy, especially in summer