when ever I fly, I wear this vest from Cabela's which I purchased years ago
Cabela's Men's SafariŽ Vest : Cabela's
I preload all metallic items into the vest before security, put the vest into the bin and I am home free.
I could carry small camera and/or DSLR lenses in it if I want. It fits easily into the overhead or under the seat in front of me
I have never been asked about it, what are they going to say, you can't put things in your pockets???
however, you take your chances, obviously my stuff is better protected by my photo backpack which is my carry on item
I would never carry all of my camera stuff in such a vest even if I could
be warned, it gets heavy fast and unless you have a better memory than I do, you forget where you put stuff