Shutterbug – an amateur photographer, especially one who isgreatly devoted to the hobby; a photographer, esp. anenthusiastic amateur.
I think this definition from Dictionary.com is apt. I can’t call myself a photographer (sounds too much like a pro photog) without being more specific.
Amateur, devoted, hobbyist, enthusiast…I think they more or less have the right focal point. (Yep. I did that.)