Canon EF50mm F1.2L USM Instruction Manual page 2

Thank you for purchasing a Canon USM lens.
The Canon EF50mm f/1.2L USM lens is a
high-performance, large-aperture standard
lens with a large-diameter, high-precision,
aspherical lens element designed for EOS
cameras.
The lens is suitable for portraits and other
types of photographs making full use of the
large-diameter lens feature for nice
background blur.
¡"USM" stands for Ultrasonic Motor.
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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Features
1. Large-diameter, high-precision aspheric lens
element for excellent imaging performance
even at the maximum aperture.
2. USM for fast, quiet focusing.
3. Manual focusing is available after the subject
comes into focus in autofocus mode (ONE
SHOT AF).
4. A truly round aperture hole results in a nicer
background blur.
5. Tight seal structure ensures excellent dust-
proof and drip-proof performance.
• The lens is dust- and water-resistant. However,
since the front lens element rotates during
focusing, dust and water can still enter from the
front. Attaching a filter is therefore necessary.
Without the filter, the lens will not be completely
dust- and water-resistant.