I told him that it would be possible, but challenging to manually align the smartphone camera lens with the eyepiece. Well, he tried anyway, I helped him to line up the lens. During the short moments that a good image appeared on the smartphone screen, a couple of pictures were taken. Here's an image of "Trevor's Moon", taken with his Samsung smartphone. Quite acceptable, although the dynamic range seems a bit narrow. I have added "enhanced" pictures (modified from the original) to show more cratered area detail. The highly overexposed bright areas did not contain enough detail to recover.
"Trevor's Moon" (original image, downloaded from his smartphone)
Southern, cratered section of the Moon enlarged.
Enhanced to show more detail.
I'm thinking of buying one of the available smartphone camera attachments (I have an iPhone 6s) and, on our public nights, have people activate the camera button. That way, they could photograph the craters of the Moon themselves (I'd email the image to them). It might be popular for SFU's Starry Nights, and our "side walk" RASC events.