Canon EF 8-15 mm f/ 4 L USM Fisheye Lens Instruction Manual (en)

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The EF135mm f/2.8 is a lens that incorporates a soft focusing 
mechanism. 
 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 
parts.
 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.
•  Due to the difficulty of adjusting the focus in MF for soft focus 
shots, we recommend that you use AF.
3. Setting the Soft Focus Index
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
.
<Correlation between aperture and the soft focus intensity>
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.
Q
  The soft focus effect can be checked as a guide with the 
highlighted areas in the viewfinder image.
Q
  Since image softness also depends on the aperture, the aperture-
priority AE mode is best for soft focus photography.
Q
  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).
4. Adjusting the Focus
Adjust the focus after you have set the soft focus index.
5. Depth-of-Field Scale
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 
.
•  The depth-of-field scale is an approximate indicator.
Nomenclature
 Contacts
  Lens mount index
  Focus mode switch
 Focusing ring
  Soft focus switch
  Soft focus ring
  Soft focus index
 Distance scale
 Depth-of-Field scale
EF Lens
EF135mm f/2.8 (with soft focus mechanism)
Instruction