(This is my entry to one of my favorite photography sites around. Just thought of sharing this to everyone who visits this site.)
The way I see it, the term "Photographic Equipment" can be anything that would allow or assist a photographer to create and present a picture in the best way he or she sees fit, however mundane or crazy the method/s may appear to be.
With this in mind, I do believe I can confidently say that the one photo equipment/gear that made quite the fundamental impact that forever changed the way I did photography...
...is a compact mirror.