Busting the Lens dictates Focus Speed Myth

Started Mar 22, 2013 | Discussions thread
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bertliza Regular Member • Posts: 108
AF of the lens matters.

I have a 40D, a Canon 17-55 f2.8 and a Tamron 17-50 f2.8. With the same camera setup and certain low light condition, the Canon 17-55 f2.8 mm can lock its AF but a Tamron 17-50 f2.8 would continuously hunt, and refuse to AF.

AF of the lens matters.

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