Compatible with select Canon lenses Including fixed focal length L-series 135mm and over, EF 70–200/2.8L, EF 70–200/2.8L IS, EF 70–200/4L, and EF 100–400/4.5–5.6L. See manuals for full compatibility information.

Maximize existing lens capability Double your focal length with a 2x zoom for improved clarity and focus over greater distances. Also reduces aperture by 2 stops.

Faster capture speeds with built-in microcomputer Functions seamlessly across camera body, lens and extender enabling swift lens response times and sharp picture quality, even when photographing moving subjects.

Resists scratches and damage Fluorine coating repels finger prints and light dust and makes the lens easier to clean.

Accessories included Comes with lens cap, rear lens dust cap and case.

Note: Will not autofocus unless existing lens has aperture of f/8 or greater.