I agree, the scroll wheel does make 100% sense. I was thinking on this during the stream and wanted to see what, if any, choice would be better and the only thing I could think of was a timed zoom based on the holding down of RMB. However, upon further thought this would complicate the distance focus so, I am not sure there is a correct button setup.
It didnt honestly hurt the score, just some thoughts that I had. Real cameras have manual focus and auto focus, perhaps an auto focus that took a bit of fiddling to get right would add the same feel but leave less annoyance on the player. I loved the art and the overall theme of the game. Great submission!
Lastly, I got some real vibes from the old pokemon game where you had to take pictures of them. I half thought it would be that when I started. :)