Congratulations on your top twenty win! Hope to see more of your work up there. Sepia-ish gives this an heirloom effect like old photographs sold in e-bay :-).
I personally like the pink touch, makes the whole thing seem a bit more vintage. Like the inclusion of the "50mm" text in the main subject. Gave it a 10, thought it would go higher than it did!
A touch more care would have had you remove those dust specks from the lens. Neat composition. Like the mix of warm and cold light - always effective in communicating shape and yet letting us see everything.
Excellent focus and DOF. Great idea. Not sure about the pink tone. Also, my eye was drawn right to the pink speck on the lense of the real camera (above the 5). .. 9
Nice rotation and close crop works well. Seems quite pink to me (and I don't think it's my monitor calibration but would be willing to consider that it might be). 8