Commlite Lens Holder CM-LF-C (Canon EF Mount) This lens holder allows you to attach two EF mount lenses and comes with a strap for easy carrying and changing. It's convenient for walking around with spare lenses attached. Please understand that this item has been handled by someone else. Compatible Lens Mount: Canon EF Mount Adopts a double lens changer system No need to place your spare lens on a table or the ground. You can hang the included strap around your body and quickly and safely change lenses while always carrying your spare lens. Made of aluminum alloy