Full Frame to APS-c

[jpalik]

On the a7 iii Is there a way to set a toggle between full frame to APS-C to a Custom button?

[Chrissie]

Do you know of the online searchable user manual?

(I don't have your camera and never felt the need for this toggling, since I don't have any APS-C lenses.)

[Lescatalpas]

7 hours ago, Chrissie said:

Do you know of the online searchable user manual?

(I don't have your camera and never felt the need for this toggling, since I don't have any APS-C lenses.)

I agree, too many simple questions are asked here, the answers are all in the manual.  The toggling to apsc size can be handy though, it can help in critical manual focussing, for instance for macro. Your full frame 90 mm behaves like a 135mm, in fact it is only cropping in camera, but most of the time for a bee or another small insect you crop in post any way. Or for birding from a hide out. I use it regularly and have the toggle under the Fn button on my a7riii.  You don't need apsc lenses to use this feature.