Canon EF 75-300mm f/4-5.6 III Manual (en)

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EF80-200mm f/4.5-5.6 II
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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 
 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 
•  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.
•  On the EF75-300mm f/4-5.6 II/III and EF90-300mm 
f/4.5-5.6 only, the focusing ring is the ring at the front 
end of the lens.
•  Do not touch the rotating parts of the lens while AF is 
•  Do not focus in MF when the focus mode switch is set to 
•  When the hood (sold separately) is installed to the EF80-
200mm f/4.5-5.6 II, you can turn the hood to adjust with 
3. Zooming
To zoom, turn the lens’ zoom ring 
•  Be sure to finish zooming before focusing. Changing the 
zoom ring after focusing can affect the focus.
  Zoom ring
  Zoom position index
  Lens mount index
  Focus mode switch
  Focusing ring
EF Zoom Lenses
EF80-200mm f/4.5-5.6 II
EF75-300mm f/4-5.6 II
EF75-300mm f/4-5.6 III
EF90-300mm f/4.5-5.6