That's a ridiculous question. Perception and reality have never had too much of anything to do with each other, in as far as what we call "reality," is much more akin to a consensus of perception. What you have here is a case where a consensus of perception can not be reached.
This isn't about being right or wrong, it's about you deciding whether you want to be on this girl's good side in the future, or if you really just don't give a shit. If you don't care what she thinks of you, then sure, don't buy a new camera. If you do, suck it up, be the bigger man, and buy the new camera.