Canon ef24mm f-1.4l usm 用户手册

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

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 

 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.

•  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. 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) 

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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 

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

through the viewfinder while rotating the focusing ring.

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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•  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.

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 Distance scale

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 Infrared index

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 Distance index

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 Contacts

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  Lens mount index

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  Focus mode switch

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 Focusing ring

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COP

Y