C70 - Optical Image Stabilization Not Working

[autoxnyc]

I have a brand new C70 with 1.0.8.1(latest) firmware.  When I tried to enable "Lens Optical IS" in the menu, the option is greyed out and the message "This function is not compatible with the current lens".  This is when I attach any of my IS capable Canon Lenses with the latest firmware.

RF24-70 F2.8

RF 14-35 F4

RF 70-200 F2.8

EF 24-105 F4 with the 0.71x mount adaptor.

AF works with all these cameras and the focal length/aperture value are communicated correctly to the camera.  Am I missing something or do I have a defective camera?  Thanks!

[autoxnyc]

Rick,

I fully understand the difference between optical IS, sensor based IS, and digital IS.  All I was saying is optical IS on a full frame lens works fine on APS-C sensor.  The larger image circle if anything is an advantage.  I don't have the R5c (I have the R5, R3, 1Dxii and 5DIV) so I don't know if optical IS works or not on that camera but optical IS works just fine on any of my cameras in video mode regardless of the existence of sensor based IS.  

[shadowsports]

Greetings,

You saved me call to support.  I noted the presence of a "✋" on the LCD screen with the switch on or off.  The icon changes color indicating on/off which makes sense.