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Designed for EOS cameras, the EF800mm f/5.6L IS USM is a high-performance super- telephoto lens equipped with an Image Stabilizer.

•"IS" stands for Image Stabilizer.

•"USM" stands for Ultrasonic Motor.

Features

1.The Image Stabilizer gives the equivalent effect of a shutter speed four stops faster*. The lens also has a second image stabilizer mode that is optimized for following shots of moving subjects.

2.The lens features outstanding image quality through the use of fluorite, super UD, and UD lens elements.

3.Ultrasonic motor (USM) for quick and quiet autofocusing.

4.Manual focusing is available after the subject comes into focus in autofocus mode (ONE SHOT AF).

5.The AF Stop button for stopping the AF operation at anytime.

6.Focus preset enables you to focus instantly at a preset distance.

7.A truly round aperture hole results in a nicer background blur.

8.The lens is compatible with Extender EF1.4X ll and EF2X ll.

9.Tight seal structure ensures excellent dust- proof and drip-proof performance.

10.Designed for lighter weight with major parts made of magnesium alloy.

*Based on [1/focal length] second. Generally, it requires a shutter speed [1/focal length] second or faster to prevent camera shake.

Conventions used in this instruction

Warning to prevent lens or camera malfunction or damage.

Supplementary notes on using the lens and taking pictures.

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