This plastic bayonet lens hood is the hood which is originally supplied by Sony with the SAL-70400G 70-400mm f/4-5.6 G SSM lens, and is offered here as a replacement for a lost or damaged hood.
This hood bayonets on to the plastic tabs specifically upon the outer barrel of the 70-400 SSM lens, and isn't for use upon any other. The petal shape is intended to provide perfect shading at 70mm when used with a 'full frame' camera, and this hood also has a removable portion to easily access a mounted polarizer.
Reviews Sony ALC-SH107 Lens Hood for the SAL-70400G 70-400mm f/4-5.6 G SSM Lens (Sony Malaysia)