You know the thing about the tail wagging the dog? Well, I've often thought that there was something akin to that involved in choice of cameras. I have about a dozen models which a use on a regular basis and really have no idea how I actually choose which one to bring out with me each day. They're like children and while I try not to show favoritism, I do have ones I tend to pick more often. What factors dictate which model today? The many factors are added into one big equation - where I'm going, weight of the camera, what the weather is like, fixed or zoom lens, battery level, how much space I have in my shoulder bag, if I intend picking up shopping on the way home and, all importantly, my mood. An almost instant number crunching happens and I pop one in my bag. The choice of camera then absolutely dictates what kinds of photos I take that day. Shooting down Gardiner Street on my bike, if I see something which interests me, I'll only stop if I know the camera I have will do the job - otherwise I keep going and make a note to myself to come back another day with a different lens (I almost always forget!). I find it interesting, later, when I look through material on my Mac, that I can immediately tell which camera any particular photo was taken with.