Godox AK-R24 is a lens designed for the AK-R21 projection attachment, which changes the angle of the beam of light cast by the lighting set. The AK-R21 attachment as well as other lenses (65 mm, 50 mm) are available separately.
The lens works perfectly with the AK-R21 attachment and, in combination with a flash, allows you to achieve creative effects. Godox offers three different lenses. The 50 mm model will generate the widest beam of light, the 65 mm is an intermediate model, and the 83 mm lens will allow you to focus the narrowest beam of light and achieve pinpoint effects.