Canon EF 75-300mm f/4-5.6 III Owner's Manual

Canon Cameras Owner's Manual - EF 75-300mm f/4-5.6 III.
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EF80-200mm f/4.5-5.6 II

Thank you for purchasing a Canon product.

 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 ❹ .

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 

active.

•  Do not focus in MF when the focus mode switch is set to 

AF.

•  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 

MF.

3. Zooming

To zoom, turn the lens’ zoom ring ❺ .

•  Be sure to finish zooming before focusing. Changing the 

zoom ring after focusing can affect the focus.

Nomenclature

  Zoom ring

  Zoom position index

 Contacts

  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

Instructions

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