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View Full Version : Contrast detection vs Phase detection Autofocus


shenstone
10th March 2008, 07:08 PM
Seeing descriptions of the 420 and reading about it's Autofocus mechanism made me wonder a little more than I have done before of the mechanisms

i.e Focusing System
Method TTL phase difference detection system, contrast detection system
Focus areas 3 points / Automatic and manual selection For contrast detection AF, 11 points are used


so a quick surf later some links are offered for your delictation should you be interested ...

http://en.wikipedia.org/wiki/Autofocus

http://www.cs.mtu.edu/~shene/DigiCam/User-Guide/5700/AUTO-FOCUS/Auto-Focus.html

Oh BTW Ian/John.... E-420 needs adding to the categories in this forum section

Regards
Andy

Ian
11th March 2008, 09:51 AM
Seeing descriptions of the 420 and reading about it's Autofocus mechanism made me wonder a little more than I have done before of the mechanisms

i.e

so a quick surf later some links are offered for your delictation should you be interested ...

http://en.wikipedia.org/wiki/Autofocus

http://www.cs.mtu.edu/~shene/DigiCam/User-Guide/5700/AUTO-FOCUS/Auto-Focus.html

Oh BTW Ian/John.... E-420 needs adding to the categories in this forum section

Regards
Andy

Thanks Andy. I will add the E-420 section now and my article on live view AF is almost finished - will let you know as soon as it is :)

Ian