This Hama rear lens cap is a must for any photographer using a Pentax K fitting SLR or DSLR camera This little piece of plastic is engineered to match the Pentax K bayonet lens mount & is simply positioned onto the mount at the rear of a lens when it has been removed & twisted to lock it into place This is the easiest way to keep the rear elements of your Pentax fit lens free from dust when you are carrying the lens in a pocket or in your gadget bag for convenience or simply to save space It is the work of just a second or two to position this & saves a lot of time & effort in cleaning the rear element a fiddly & precise task at best 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 Surely this is a truly small cost to save a potential large repair bill & a camera out of action This is a small but essential piece of equipment that should be found in every Pentax SLRDSLR user’s gadget bag Protects the lens when it is transported without camera body Suitable for DSLR cameras For Nikon