Canon ET-78B Lens Hood for EF 70-200mm f/4L IS II USM

The Canon 2310C001 is the ET-78B lens hood created for the EF 70-200mm f/4L IS II USM lens. Its main job is to shield the front element from stray light and physical knocks, so every frame you capture looks as clean as possible.

The conical profile blocks off-axis light that can lower contrast or introduce flare. In practical terms, you will notice richer colors and clearer details when you shoot in bright backlight, under stadium lights, or near reflective surfaces such as water and glass.

Beyond optical benefits, the hood serves as a protective barrier. The sturdy yet light structure takes the first impact if your camera brushes against a doorway, a tree branch, or the edge of a crowded photo pit, helping prevent scratches or worse damage to the lens.

Attachment is straightforward thanks to Canon’s bayonet mount. A quick twist locks the hood in place, and the same motion removes it when you are ready to pack the lens. The secure fit means you can change setups confidently even when working fast or wearing gloves.

Keeping a spare hood on hand is a simple way to avoid downtime if the original goes missing, and many photographers choose the ET-78B for that exact reason. Whether you specialize in travel, sports, wildlife, or portrait work, this small accessory adds a layer of insurance and consistent image quality to your kit.

• Purpose built for the Canon EF 70-200mm f/4L IS II USM lens
• Conical shape directs stray light away to reduce glare and flare
• Acts as a physical barrier that helps guard the lens glass against scratches and accidental impacts
• Durable materials that keep the hood light in weight
• Bayonet mount provides secure and quick installation