Canon EF 135mm f/2.8 产品宣传页

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The EF135mm f/2.8 is a lens that incorporates a soft focusing 

mechanism. 

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.

•  Due to the difficulty of adjusting the focus in MF for soft focus 

shots, we recommend that you use AF.

You can select a soft focus index of 0, 1 or 2. Higher settings give a 

more pronounced soft-focus effect. Selecting the 0 setting disables 

the soft focus effect.

While sliding the soft focus switch in the direction of the arrow, 

select the image softness by turning the soft focus ring

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The recommended settings for normal portrait shots are an aperture 

of f/2.8 (wide aperture) and a soft focus index of 2. In shots with 

strong backlighting or highlights, you should reduce the soft focus 

index to 1.

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  The soft focus effect can be checked as a guide with the 

highlighted areas in the viewfinder image.

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  Since image softness also depends on the aperture, the aperture-

priority AE mode is best for soft focus photography.

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  For more information on the effects of combinations of soft focus 

indexes and aperture settings, see the enclosed leaflet (Comparisons 

Between the Soft Focus Index and Aperture).

Adjust the focus after you have set the soft focus index.

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 5 m and the aperture is f/22, the 

area in focus will extend from about 4.5 m to 7 m 

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

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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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  Soft focus switch

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  Soft focus ring

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  Soft focus index

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 Distance scale

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 Depth-of-Field scale

EF135mm f/2.8 (with soft focus mechanism)

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