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Manual Canon EF 75-300mm f/4-5.6 III USM Camera Lens

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Manual

EF55-200mm f/4.5-5.6 USM

EF55-200mm f/4.5-5.6 II USM

EF80-200mm f/4.5-5.6 USM

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●❶

●❷-●Ⓐ

●❷-●Ⓑ

●❹

●❺

Thank you for purchasing a Canon product.

Safety Precautions

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.

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 as shown in diagram

❶

, 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.

• 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 EF55-

200mm f/4.5-5.6 USM, EF55-200mm f/4.5-5.6 II USM

and EF80-200mm f/4.5-5.6 USM, 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

●①

Zoom ring

●②

Zoom position index

●③

Contacts

●④

Lens mount index

●⑤

Focus mode switch

●⑥

Focusing ring

EF Zoom Lenses

EF55-200mm f/4.5-5.6 USM

EF55-200mm f/4.5-5.6 II USM

EF80-200mm f/4.5-5.6 USM

EF75-300mm f/4-5.6 II USM

EF75-300mm f/4-5.6 III USM

EF90-300mm f/4.5-5.6 USM

Instructions

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Download manual in English (PDF, 0.44 MB)

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Specifications

Brand	Canon
Model	EF 75-300mm f/4-5.6 III USM
Category	Camera Lenses
File type	PDF
File size	0.44 MB

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Frequently Asked Questions about Canon EF 75-300mm f/4-5.6 III USM Camera Lens

Our support team searches for useful product information and answers to frequently asked questions. If you find an inaccuracy in our frequently asked questions, please let us know by using our contact form.

What does the "f" stand for with camera lenses? Verified

The f-ratio stands for the reciprocal of the relative aperture. This is the ratio of the system's focal length to the diameter of the entrance pupil. A higher f-ratio means a smaller entrance and thus less light coming into the lens.

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