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yg1968
Carpal Tunnel
Reged: 01/26/04
Posts: 1755
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Re: 127mm Mak for astrophotography??
08/11/08 05:20 PM
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Jay. Interesting stuff. But I often wonder what this means in practice. I like using focal reducers with my C11 and my Starshoot I in order to increase the field of view. This way, the focus looks better, the stars look rounder because they are smaller and it is possible to fit the object in the field of view.
However, I suppose that I could use a larger chip camera such my Canon 350D with a higher focal lenght to get a larger image which would achieve the same results (smaller stars when compared to the overall size of the image).
Reading Wodaski's book, I am guessing that imaging at focal lenghts varying from 500mm to 1500mm is probably the best that I can hope to acheive using an Atlas mount (even if it is auto-guided). For this reason, I have recently purchased a C6 SCT (F10, 1500mm focal lenght and only 10 pounds) which I intend to use with my DSLR. Imaging at focal lenghts higher than 1500mm would probably require a better mount. I decided to get the C6 SCT because it allows me to image at 500mm, 1000mm or 1500mm (and mostly because it was only $400!). Let me know if you disagree with any of what I just said.
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