Canon EF 50mm f1.4 USM User Manual

Cop y, Ef lenses

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Safety Precautions

1. Do not look at the sun or a bright light source through the

lens or camera.

Doing so could result in loss of vision. Looking

at the sun directly through the lens is especially hazardous.

2. Whether it is attached to the camera or not, do not leave the

lens under the sun without the lens cap attached.

This is to

prevent the lens from concentrating the sun’s rays, which could

cause a fire.

Handling Cautions

If the lens is taken from a cold environment into a warm one,

condensation may develop on the lens surface and internal


To prevent condensation in this case, first put the lens

into an airtight plastic bag before taking it from a cold to

warm environment. Then take out the lens after it has warmed

gradually. Do the same when taking the lens from a warm

environment into a cold one.

1. Mounting and Detaching the Lens

See your camera’s instructions for details on mounting and

detaching the lens.

• After detaching the lens, place the lens with the rear end up to

prevent the lens surface and contacts from getting scratched.

• If the contacts get soiled, scratched, or have fingerprints on them,

corrosion or faulty connections can result. The camera and lens

may not operate properly.

• If the contacts get soiled or have fingerprints on them, clean them

with a soft cloth.

• If you remove the lens, cover it with the dust cap. To attach it

properly, align the lens mount index and the  index of the dust

cap, and turn clockwise. To remove it, reverse the order.

2. Setting the Focus Mode

To shoot in autofocus (AF) mode, set the focus mode switch to AF


To shoot in manual focus (MF) mode, set the focus mode switch

to MF, and focus by turning the focusing ring. The focusing ring

always works, regardless of the focus mode.

• After autofocusing in ONE SHOT AF mode, focus manually by

pressing the shutter button halfway and turning the focusing

ring (Full-time manual focus)


3. Infinity Compensation Mark

To compensate for shifting of the infinity focus point that results

from changes in temperature.

The infinity position at normal temperature is the point at which the

vertical line of the L mark is aligned with the distance indicator on

the distance scale


• For accurate focusing in MF on subjects at infinity distance, look

through the viewfinder while rotating the focusing ring.

4. Infrared Index

The infrared index corrects the focus setting when using

monochrome infrared film. Focus on the subject in MF, then

adjust the distance setting by moving the focusing ring to the

corresponding infrared index mark


• Some EOS cameras cannot use infrared film. See the instructions

for your EOS camera.

• The infrared index position is based on a wavelength of 800 nm.

• Be sure to observe the manufacturer’s instructions when using

infrared film.

• Use a red filter also when you take the picture.


Distance scale

Infrared index

Distance index


Lens mount index

Focus mode switch

Focusing ring

EF Lenses

EF14mm f/2.8L USM
EF20mm f/2.8 USM
EF24mm f/1.4L USM
EF28mm f/1.8 USM
EF35mm f/1.4L USM

EF50mm f/1.4 USM
EF85mm f/1.8 USM
EF100mm f/2 USM
EF200mm f/2.8L USM




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