Here's one of the strangest looking rear lens caps we ever did see. The Japanese camera accessory company UN has created a cap that has a temperature and humidity meter built in to help you take perfect care of your glass.
BlackRapid's new series of rear lens caps, dubbed "LensBling," offer an interesting way to organize and identify your lenses in a hurry. The ideal moment doesn't wait for you to find the right lens, and so the precious moments you could save when trying to distinguish your 85mm from your 105mm could mean the difference between a great picture and a missed opportunity.
The Lens Lock is the latest product in the GearGuard gear locking system by Gary Fong (maker of the well known LightSphere). It attaches to the back of a lens like an ordinary rear lens cap, but can be secured and locked using a cable/lock combo. This allows you to lock the gear down when not in use (like you would do with a bike) or lock it together with other gear in your bag, preventing individual items from being stolen from your bag.
Nikon recently (and quietly) replaced their LF-1 lens cap with the LF-4 (so much for Nikon tetraphobia), …