Because power consumption has always been a concern with mirrorless cameras, I've assigned the 'AF point' button (top right) to the 'Display Off' function for topside shots on my Canon R5 for years.

For some reason, however, I can't activate this function in my Nauticam housing.

And it's only this function that's affected!

If I assign the button to, for example, 'drive mode', I can activate that with the 'AF point' button - and this applies to all other buttons as well: 'Display Off' can't be activated.

Does anyone have any idea what could be causing this?

From what I understand, then, the button on the Nauticam housing works.

I don't have a Canon, but... check the EVF settings.

In Lumix cameras, there are settings where the EVF and the display can be set to activate exclusively. As soon as you bring your eye close to the EVF, the display turns off. There is a proximity sensor near the EVF. When you close the back of the housing, it's as if you were bringing your eye close to it.

Maybe there is some setting causing this mess.

Without the housing, try covering the EVF with a finger and using the button to see if it works.

Ciao

Hi Davide,

thanks for your reply!

I already tested that:

There are four different viewfinder/display options on the R5, but unfortunately 'display off' doesn't work with any of them.