These Holga turrets help you create fascinating photos with unique and magical effects. Each turret features 9 effects and functions including tone-changing, split-image, diffusion and macro. There are total 18 effects/ functions. The lens itself is focus free which means you do not need to worry about focusing. Its effective distance is 2.5m to infinity. The turret is to be put on the lens base unit by a built-in magnet. Swapping filter is hassle free, it will click into place as you turn the turret. These gadgets will definitely add a lot more fun in your party with your loved ones. To make your creatives more interesting, turn the turret while shooting a movie with children or pets. We have included a few sample images taken with this kit. A lens base unit, 2 turrets, 2 turret covers and a pouch are included. The camera shown in photos is not included.