I really like the concept. Reminds me of the sun (light) and the shutter is a nice touch. I think it might be a little too "typical" (the shutter). I like #79 and #80 the best, but I would prefer a white background. Could you also incorporate a "heart" into the photo and add the slogan on the bottom "Light. Hearted. Photography." ?
Thank you for taking our suggestions into consideration, however, I should have mentioned that we do not want any pink in our logo, because we are trying to keep it gender neutral.