The Canon Eyecup EF is a replacement eyepiece accessory designed for select Canon EOS DSLR cameras. It provides cushioning around the camera viewfinder, improving comfort during extended shooting sessions while helping to reduce interference from stray ambient light.

Its soft construction makes it particularly useful for photographers who wear glasses, while the secure slide-on design offers a simple replacement solution for lost or damaged eyecups. The eyecup also helps protect the viewfinder area from dust, moisture, and minor scratches during everyday camera use.