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Old 12-03-2012, 12:24 PM
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philiphart (Phil Hart)
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Join Date: Jan 2007
Location: Melbourne
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Quote:
Originally Posted by Martin Pugh View Post
I think I have come to the end of using this lens. I got very good results finally with the lens at f4.5 with very good stars across the field.

I put the lens back on to the Canon 550D, as a trial to see what sort of results I got there, and much to my surprise the excessive off axis aberrations were back - with the lens at f4.5. So what I achieved with the ST8300 did not replicate on the DSLR.

Anyway - one lesson - I think buying anything less than a full frame DSLR for astrophotography is a waste of money and time.

cheers
Martin
16MB FITs?! Some JPG examples would be nice for those of us travelling without our full suit of astro-imaging software at hand!

I don't quite follow what you think the problem is with the 550D and why that would be any less of a problem on full-frame?

Have you checked that the tilt is in the 8300 sensor and not the lens? You can be sure that the 550D is as flat/square as any sensor can be.

Phil
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