Canon ef24mm f-2.8 用户手册

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

 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 

 This is to prevent the lens from concentrating 

the sun’s rays, which could cause a fire.

 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.

The EF50mm f/1.0L USM and EF85mm f/1.2L USM are 

ultra-high-precision lenses. Take care not to subject them to 

shocks or impacts. Also ensure that the lenses are set to the 

“

∞

” setting before putting them in the case.

•  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.

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

to AF 

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

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

Two autofocus ranges are selectable with the lens 

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0.6-

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: From closest focusing distance to infinity.

1-

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: From 1 m to infinity.

The depth of field is the distance in front of and behind the 

plane of focus on the subject that appears sharp. The depth 

of field is indicated by the area between the depth-of-field 

scale lines below the distance scale. The numbers on the 

scale are F values, and for example, if the shooting distance 

is 1.5 m/5 ft. and the aperture is f/11 with the EF35mm 

f/2, the sharp area will extend from about 1.2 m/4 ft. to 2.8 

m/9.3 ft. 

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•  The depth-of-field scale is an approximate indicator.

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 

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•  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.

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 Distance scale

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 Infrared index

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 Depth-of-Field scale

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 Distance index

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 Focusing ring

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  Focus mode switch

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  Lens mount index

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 Contacts

EF15mm f/2.8 Fish-eye

EF24mm f/2.8

EF28mm f/2.8

EF35mm f/2

EF50mm f/1.0L USM

EF50mm f/1.8

EF85mm f/1.2L USM

COP

Y