Is AF-C basically a myth for NEX?

Started Feb 4, 2013 | Discussions thread
EinsteinsGhost
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Re: Is AF-C basically a myth for NEX?
In reply to Brian Caslis, Feb 5, 2013

Brian Caslis wrote:

EinsteinsGhost wrote:

Well, DSLRs aren't very good in high speed burst mode either (that is where SLT advantage shows up). The typical DSLR will get highest burst rate in release priority mode, which locks focus on first frame. The slower rate will have AF-C through the mirror.

In SLTs (and in NEX with EA2), full time AF-C is maintained even at highest burst rate (10 fps in A55, for example). The limitation, however, is that exposure is set at the first frame and at f/3.5 (however, switching to AF-S allows control over exposure but then... no AF-C). You'd have to settle for 6 fps (in A55) or 8 fps (I think, in A77) for AF-C with exposure control. DSLRs are slower than that.

I'm not sure which DSLRs you are referring to. All that I have used do indeed do continuous refocusing in continuous mode. Many do burst slower, but mid-range ones can do 7fps and top end ones can do 10fps. Sony SLT are a bit faster burst, but to be honest if I was doing this kind of shooting I'd take a Nikon D4 over any Sony model any day.

Why do you think we ought to compare something like Nikon D4, a $6K camera body, with NEX? Why not comparable DSLRs? Name one $1K DSLR that shoots with AF-C at 8-10 fps in focus priority.

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Sony A55, Sony NEX-3, Sony F828

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