SLT A55, + and - and Canikon

Started Aug 27, 2010 | Discussions thread
Dennis Forum Pro • Posts: 17,750
Re: CD vs PD Af on older lenses....

Joseph S Wisniewski wrote:

That slowness means that they can't really do the "dance" that CD-AF requires, move the lens a little, see if contrast is increasing or decreasing, move it the other way a little, repeat until something gets in focus.

Thanks for the explanation ! That makes sense when I recall trying a 4/3 lens on an EP1 and watching it get close focus quickly, then 'dance' around correct focus for a frustrating amount of time.

  • Dennis

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