No more lost lens caps the hfa lens cap clip makes it easy to keep track of all of your lens caps by attaching this clip to your camera strap or camera bag and letting it hold your lens cap when its not on the lens just attach the clip to your backpack camera strap or camera bag slip your lens cap into the clip and youll always know exactly where your lens caps are the clip fits all kinds of slr lens caps including nikon canon sigma and tamronit can connect to all types of slr neck