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RF800mm/f11 and size of AF-area on EOS R3/R5/R6/R7/R10

Started 9 months ago | Discussions thread
John Sheehy Forum Pro • Posts: 26,688
Re: RF800mm/f11 and size of AF-area on EOS R3/R5/R6/R7/R10

drsnoopy wrote:

Several of the YouTube reviews of the R7 have shown that the AF area is proportionately bigger on the crop sensor when using the RF 600 & 800 f11 lenses. I suggest you search the video reviews for a demonstration of the difference.

If you set crop mode on an R5/6 you get the same effect.

While that is true in the viewfinder and regarding the output frame, the actual area in mm x mm on the sensor is still smaller, and therefore the angle of view with active AF can still be smaller with the smaller sensors and crop mode, if they do not make the box 1.6x as wide and tall inside the viewfinder.

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Beware of correct answers to wrong questions.
John
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