And what if she shoots Canon??? Or are you not into mixed platform relationships?
Dude...I have a Canon system...and a Nikon system...and a Bronica system...and some M42 lenses too!!! And 17 F-mount to Canon adapters...
Now, interestingly, I normally shoot the adapted lenses on the Canon in Av automatic mode...that works well for me when using either F-mount, Olympus, or m42 thread mount lenses on my Canon 5D...
This week, I went to the seashore and made 674 pictures. ALL of them,every single one, was shot in Aperture Priority automatic with a Nikon, using a 70-200/2.8 zoom, and Matrix metering, with ISO values of 100,200,250,400, a handful at 800, a handful at ISO 1,600 after the sun had set. I used +.7 exposure compensation in some extreme backlighting against the sunset and ocean surf.
And...you know what??? Using Aperture Priority auto, my Nikon pounded out 674 good exposures. Easy-peasy Lightroom processing. Only minimal effort needed. Damned near perfect exposures. I was free to aim, compose, and shoot. I barely chimp at all these days because my close-up vision SUCKS with my shooting glasses on my face, and the viewfinder image's apparent distance is around six feet (trust me, it's not a close-up distance..it's about six feet!), so
I can't see chit on the back of the camera any more unless I take my glasses off, so...I don't chimp much at all...I mean, it does me no good...