View single post by jk
 Posted: Wed Feb 20th, 2013 08:37
jk



Joined: Mon Apr 2nd, 2012
Location: Carthew, Cornwall, United Kingdom
Posts: 6874
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 I dont really see any particular advantage of the 800 f5.6 over a 600mm f4 or 400mm f2.8 other than having a dedicated 800 lens as either of the two other lenses can achieve 1000/1200mm at f8 compared to the 1000mm f7 of the new lens.

I know that this 1/3 stop may mean that the AF performs better but I dont think it will make much difference under poor light conditions.



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