Sweet Image Mike, diggin them blue stars everywhere, really sets off the Red Neb
I no have CC but only a question , in a word - how does two scopes benefit an image - not that i wanta try it
Sweet Image Mike, diggin them blue stars everywhere, really sets off the Red Neb
I no have CC but only a question , in a word - how does two scopes benefit an image - not that i wanta try it
Hey cheers Bob.
Even though they have similar focal lengths, The 6" Starfire APO with the big 16803 chip has a much larger field than the AG12 gets with the smaller sony chip in the Starlightxpress. The AG12 data is higher resolution, showing more fine details than the Starfire too due to having a larger aperture, the pixels being smaller and the seeing is better here in Canberra than it was in Newcastle, so the details immediately around the paw pads themselves is increased over what the original Starfire only image showed.
I have a question too. When adding new data to old do you integrate all individual subs together again or just combine the old master to the new master (or old master to new individual subs) ?
I have a question too. When adding new data to old do you integrate all individual subs together again or just combine the old master to the new master (or old master to new individual subs) ?
Interesting question, I have done both depending on the quality of the data. When integrating higher res data with lower res data the key is to do it in a way that isn't obvious, usually the higher res data stands out and you will see this effect in some Orion region composites for example, the higher res data used for M42 or the Trifid stands out and can make the image look odd not to mention the diffraction spikes that are only in one set of data. So blending finesse is paramount In this case the data resolution difference wasn't huge so getting a natural looking blend was easier and the diffraction spikes present in the AG12 data set are not too obvious
Interesting that the FLI camera needs darks where the Sony doesn't.
Just different chips, the 16803 is still a fairly clean chip (HERE is a 10min dark at -30C)but is a just little noisier than the Sony, I could probably just dither and median combine with it too but I never tried ...if I put the big Proline back on the AG12 I may try it just to see, of course the big 16803 chip does need flats due to vignetting.
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.
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?
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.
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
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.
Even though they have similar focal lengths, The 6" Starfire APO with the big 16803 chip has a much larger field than the AG12 gets with the smaller sony chip in the Starlightxpress. The AG12 data is higher resolution, showing more fine details than the Starfire too due to having a larger aperture, the pixels being smaller and the seeing is better here in Canberra than it was in Newcastle, so the details immediately around the paw pads themselves is increased over what the original Starfire only image showed.
Mike
Wow, your explaination is very understandable, what a grouse concept - the best of both views in the one Image. Definately worth the excercise then !!
Thanx for that Mike ...
...if I put the big Proline back on the AG12 I may try it just to see, of course the big 16803 chip does need flats due to vignetting.
