Sony a7: using non full-frame E-mount lenses.

I'm really interested in the A7 but am nervous about the really small selection of lens choices currently available.

I'm fairly clueless about the ins-and-outs of how lenses and sensors interact, but I am learning....

I'd really like a "walking around" lens like the Sony 18-200mm F3.5-6.3 .

I assume this lens would work on the A7 but you'd have to crop the image to get rid of the dark corners? (I didn't see that the A7 has an "auto-crop" mode)....

Sony a7: using non full-frame E-mount lenses. Sony a7: using non full-frame E-mount lenses.