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Why is an DSLR better? Is it because of the higher resolution?
I was considering a Canon 550D for photography and home videos as it can now also take FULL HD 1080p at 30fps, or 720p at 50fps. Is this useful for image stacking?
So why do I need to guide using a DSLR?
...thinking music....
Ah, I think I understand...guiding is required because DLSRs take a single long exposure shot. Whereas CCD can take many frames per second the so that an image stacker software package can remove any image position errors.
If I used a single shot DSLR, what length exposure do I need to take an nice shot of Saturn? Do I really need a guider ? Is a single long exposure shot better than a stacked frames image? Or is this a purists argument (sorry I don't want to start a flame war!!!).
So, why not buy a cheaper and lighter CCD?
With CCDs, do you mount these at prime focus, or can you use an eyepiece? What is the difference? How do they magnify the image? Surely not via digital enhancement?
Lastly, given I have a largish ACHRO refractor, am I wasting my time over instead saving for a smaller APO refractor (eg 80 or 100 mm ED) and piggy backing them? Our mount can handle the weight.
Sorry about the all the questions!!!
Thanks in advance
James
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