Lens caps are as easy to lose as they are important, which poses a big problem for the safety of your camera lenses. Fortunately, Flickr user RawSniper1 has a clever solution: attach a LEGO brick.
As you can see in the picture above, he placed one LEGO brick on the front of the cap and another on his camera strap. This way the lens cap easily snaps on to the strap when not attached to the lens for quick and simple storage. Another alternative? Velcro — but it's not as fun.
Use Lego To Keep Your Lens Cap Safe [DIY Photography]