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Canon EOS 4000D and EF 50mm 1.8STM

Started 7 months ago | Questions thread
OP DarkoR New Member • Posts: 3
Re: Canon EOS 4000D and EF 50mm 1.8STM

In description of camera's specifications, I've found that more expensive cameras like EOS 850D has:
"Via optical viewfinder:
45 cross-type AF points
(45 f/5.6 cross-type AF points, 27 f/8 points (9 cross-type), centre point is f/2.8 and f/5.6 dual cross-type)"

and for EOS 4000D:
"Via optical viewfinder:
9 AF points (f/5.6 cross type at centre)"

As we can see 850D has f/2.8 centre point, and 4000D has only f/5.6.
My question is what is difference between f/2.8 and f/5.6 points?

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