[spc476]

A month ago I was walking around (not in Canada, but for the sake of argument, let's say it was) taking pictures when a gentleman called me over and asked if I would take a picture of him and his wife (technically, a commission) with his camera.

Now, who owns the picture I took?

[potatolicious]

You own the picture. The gentleman didn't pay you - a request is not a commission nor a work for hire. Some concrete renumeration must occur.