I like that you're being creative with the "p" and "f" letters...but we need to take it up a notch somehow, and make it relevant to what the app actually does. Taking user's "flat" digital photos and applying realistic paper-like effects to them, or making them look like they're actually mounted inside a realistic picture frame...
We like the pen drawing the camera, though we're not certain it communicates quite enough about our app. The font in #49 is WAY better than #48. Let's stick with the modern, clean san-serif fonts.
#49 seems more like it's about painting than photography--though I see what you're trying. Maybe take another stab at it, emphasizing printed, paper photographs instead?
I'm not sure what #58 is supposed to represent. Is that two people? What do they have to do with the printed photos (other than possibly being the subjects of a particular photograph?).
I like the style of the icon, but it just isn't communicating the specifics of what we need.