Nikon HB-40 Bayonet Lens Hood for AF-S 24-70mm f/2.8G ED mitsubishi-imaging It keeps light from spilling

It keeps light from spilling off the edges of the umbrella

EF 300 mm f/2

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

and will take various size reflector panels from 2O" to 48"

The Nikon AF-S DX Zoom-Nikkor 12-24mm f/4G IF-ED lens is an ultra-wide-angle lens

Nikon HB-40 Bayonet Lens Hood for AF-S 24-70mm f/2.8G ED mitsubishi-imaging It keeps light from spillingThe 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.