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Canon EOS 4000D and EF 50mm 1.8STM

Started 7 months ago | Questions thread
Dunlin Senior Member • Posts: 2,611
Re: Canon EOS 4000D and EF 50mm 1.8STM

DarkoR wrote:

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?

If an AF point is f/5.6, then it won't work with lenses slower than that aperture, eg. f/8.

On my 7D, the AF centre point is dual-cross type at f/2.8. I think that's what the part about the 850d means.

The 850D uses Dual Pixel AF (in liveview), which allows the camera to focus at f/8 in live view.

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Canon PowerShot SX410 IS Olympus OM-D E-M10 II Canon EF 35-80mm f/4.0-5.6 III Olympus M.Zuiko Digital ED 40-150mm F4-5.6 R Gimp +6 more
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