Loansharkx asked an interesting question about what some of the most most useless pieces of photo gear are. Following in his footsteps, I'd to see what are some of the most useful, non-camera / non-lens, photographic tools we use are.
Mine is my Kirk L-bracket for my D100 and RRS L-bracket for my D70.
Mine is my Kirk L-bracket for my D100 and RRS L-bracket for my D70.