The Hama Lens Cap Holder is a simple device which attaches around your lens by means of an elasticated loop. The end of the cap
...The Hama Lens Rear Cap for Canon EOS is a must for any photographer using a SLR or DSLR camera. This little piece of plastic is engineered to simply be positioned onto the mount at the rear of a lens when it has been removed & twisted to lock it into place. It itakes just a second or two to position this & saves a lot of time & effort in cleaning the rear element, a fiddly & precise task. This rear lens cap also helps to protect the lens mount itself & the essential electronic contacts around it from accidental damage because of the way that it fits snugly onto the lens mount.