Some concepts are just so startlingly simple that it's hard to believe that they aren't actual products yet. One such concept is this camera strap with embedded solar panels that could keep your camera's battery topped up as you use it.

Designed by Weng Jie, and shown off on the excellent Yanko Design, the strap features thin solar films to a regular sized camera strap.

We've seen solar panels in back-packs and iPhone cases, so surely it would be possible to make this eco-friendly concept a reality?