The QC-2N Lens Changer from Dorr is a really nifty piece of kit! It allows you to change your lens on your camera instantly when a quick change is essential and the correct focal length must be available within seconds. This Lens Changer is able to hold 2 Nikon F Lenses on either side of the aluminium housing and the adjustable shoulder strap with safety carabiner is then placed around your neck for whenever you need your lenses changing.