Nikon HB-40 Bayonet Lens Hood for AF-S 24-70mm f/2.8G ED mitsubishi-imaging Compatible with Canon EF 70-200

Compatible with Canon EF 70-200 f/2

EF 300 mm f/2

while the contact surface with the camera body uses an aluminum component similar to that used in XF lenses

Each can be programmed as needed with up to 20 ControlTL channels for TTL photography

It keeps light from spilling off the edges of the umbrella

Nikon HB-40 Bayonet Lens Hood for AF-S 24-70mm f/2.8G ED mitsubishi-imaging Compatible with Canon EF 70-200The Nikon HB 40 lens hood is used to prevent stray light from entering the front lens surface causing flare. By reducing the amount of non essential light falling onto the front lens element, lenses can better achieve their optimum optical performance, producing more saturated images. Use of specifically engineered Nikon lens hoods is highly recommended. In less than ideal lighting conditions, the performance difference can be substantial.