Good idea but the purple fringing is really killing this image for me personally. If the image quality had been good this would potentially be a 7-8 from me but as it is I really can“t give it more than 5.
There are no tacks in this image. ;) Very creative use of a rather mundane everyday thing. The color and clarity work well. I am left felling a little sad for the tack whose head you ripped off but some must give their lives for a greater cause. 8 for originality.
There is something about the interaction between the clear tacks, the light, and the lens that has rendered a strange purple glow on the left edge of each tack. I imagine that if it were very much more prominent we could accept it as a feature, but in its current configuration it strikes one as a serious lens problem. I like the choice of color palette and materials for the photo, but find the composition a little static.