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Which Canon Lens?
ok camera gurus, not having done any camera and lens astrophotography l need some advice on lenses. l have done some research and come up with a couple of early front runners and would appreciate comments on either of these, good or bad.
1. 135mm EF f/2L USM
2. EF70-200 f/2.8L USM both of these are the same price so money isn't an issue. thanks.
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