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Old 15-03-2012, 09:04 AM
Poita (Peter)
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Join Date: Jun 2011
Location: NSW Country
Posts: 3,585
Well, the lens is more versatile as you can use it as a camera lens.

However, we have some supposedly wonderful, and very expensive Canon camera lenses (and they are great for standard photography) that perform quite poorly for astronomical work. I can't imagine a tele-extender would do it any favours either.

You already have the canon, how does it perform for astro photos?
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