Features:
1. Humanized installation design, does not damage the lens apron
2. UV cut-off coating to reduce UV interference
3. High-definition glass, does not affect the lens focus
4. Black out the edge of the lens to reduce stray light
5. Waterproof, oil-proof, easy to clean
This UV model is CT-1 Suitable for the following lenses:
Canon EF 800mm 1: 5.6L IS USM
Canon EF 400mm 1: 2.8L IS USM