Aputure Spotlight Mount Precision optical system gives a high output, high resolution, and even beam. Standard bowens mount offer a wide compatiability for Aputure 120D Mark 2 Aputure 300D Aputure 120D and other bowen-S mount continuous lights. Interchangeable projector lens design; Three-layer-shutter allows for more flexible light shaping. Dual slot design allows for using iris and Gobo(B size) simultaneously,(Iris is not included in package). Aluminum alloy die casing, durable and lightweight design. will work with 600D with some wasted light intensity