Why would AF be so slow on RX1?

Started Nov 17, 2012 | Discussions thread
tbcass Forum Pro • Posts: 33,112
Re: Contrast Detection vs. Phase Detection...

mastix wrote:

Well... don't agree on this. When you shoot moving people from short distance and you cannot rely on DOF because of open apertures, as many reporter or street photographers do, fast AF is critical. I bet you that many photographers will be using this 35mm mostly at f2-f4. In this condition you don't have the time to focus manually because once you nail focus the photo has vanished....

I'll have to disagree as well. You'd be surprised how fast you can manual focus with practice if you have to. Back in the old days of film and before there were AF cameras we were able to focus fast and accurately under the very conditions you describe with prime lenses. I could manually focus just as fast as a camera with AF, faster than cameras with CDAF. It became instinctive. Where AF is most useful is with zoom lenses where you have to zoom and focus at the same time.

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