How does multi-point AF work?

Started Nov 3, 2012 | Questions thread
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Jim in Hudson
Senior MemberPosts: 1,639Gear list
How does multi-point AF work?
Nov 3, 2012

I know this seems like a stupid question that only someone who barely has ever used a camera would ask.  That said, I don't really know.

Most basically, what does the camera do under 5-point AF?  Every point has a "subject" of some type so what drives the selection of the point for focusing?  Manuals (in my case, K30) never really explore this question but I'm sure many here can.  Thanks.

 Jim in Hudson's gear list:Jim in Hudson's gear list
Pentax K-3 Fujifilm X-T10 Sigma 10-20mm F4-5.6 EX DC HSM Pentax smc DA 17-70mm F4.0 AL (IF) SDM Pentax smc DA 18-135mm F3.5-5.6ED AL [IF] DC WR +4 more
Pentax K-30
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