For those occasions when you're carrying more than one lens, the Sony E/FE Lens Changing Kit Adapter v2 from Peak Design will help you change lenses faster, and with added versatility. Simply attach the Lens Changing Kit to a backpack, strap, bag, or belt. With this kit you can change lenses with one hand and have a convenient place to store the lens you just removed. By storing the lens outside of your camera bag you will free up space for other gear.