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rf 800mm f/11 lens puts a "square" on my screen and view finder

Started 1 month ago | Questions thread
drsnoopy Senior Member • Posts: 1,216
Reduced AF ares
8

Nothing whatsoever to do with the 1.6x crop. On most bodies the AF area is reduced with this lens (and also the 600/11). The only exception is the R3.

This is well documented online in many places, including by Canon.

OTOH if you choose to apply the 1.6x crop, you will get almost the whole screen area available for AF.

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