Canon EF40mm f/2.8 STM Instructions

Browse online or download pdf Instructions for Camera Lens Canon EF40mm f/2.8 STM. Canon EF40mm f/2.8 STM 2 pages. Compact, lightweight, low-profile high quality standard single focal point lens

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EF Lenses

EF40mm f/2.8 STM

Instructions

Thank you for purchasing a Canon product.

EF40mm f/2.8 STM is a compact, lightweight, low-proﬁle high quality standard

single focal point lens.

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"STM" stands for Stepping Motor.

Safety Precautions

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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.

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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

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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.

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Do not leave the lens in excessive heat such as in a car in direct sunlight.

High temperatures can cause the lens to malfunction.

Cautions during shooting

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This lens uses a stepping motor to drive the focusing lens (the lens that has

the job of focusing the shot).

1. Cautions when the power is off

Since the motor does not operate when the camera is off or has been

turned by the auto power-off function, take note of the following points.

2. Cautions when the lens is in sleep mode

This lens has a sleep mode separate from the camera auto power-off

function for saving power when the lens has not been operated for a period

of time.

Since the motor does not operate when the lens is in sleep mode, even if

the camera is turned on, take note of the following points.

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To retract the lens if extended, keep the lens attached to the camera, and

then autofocus at inﬁnity or turn the focusing ring.

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To shoot with this lens attached on an EOS-1D Mark IV, update the EOS-

1D Mark IV ﬁrmware to version 1.1.1 or later. Updating to this ﬁrmware will

optimize exposure accuracy.

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When using an EOS ﬁlm camera, the action of the focus may slow down if

the battery is low on power or when the ambient temperature is low.

Nomenclature

①

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Focus mode switch

②

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Focusing ring

③

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Lens mount index

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④

Contacts

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About the AF frame selection

High accuracy cross (+) detection can be used in the center AF frame and

horizontal line detection can be used in the frames other than the center AF

frame for the following cameras.

EOS-1Ds Mark III, EOS-1Ds Mark II, EOS-1Ds, EOS-1D Mark IV,

EOS-1D Mark III, EOS-1D Mark II N, EOS-1D Mark II, EOS-1D, EOS-1V,

EOS-3

Conventions used in this instruction

Warning to prevent lens or camera malfunction or damage.

Supplementary notes on using the lens and taking pictures.

1. Mounting and Detaching the Lens

See your camera's instructions for details on mounting and detaching the

lens.

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After detaching the lens, place the lens with the rear end up to prevent

the lens surface and contacts from getting scratched.

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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.

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If the contacts get soiled or have ﬁngerprints on them, clean them with a

soft cloth.

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If you remove the lens, cover it with the dust cap. To attach it properly,

align the lens mount index and the

❶

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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 turn

❸

the focusing ring to set the focus

When the camera AF mode is ONE SHOT AF, focus manually by pressing

the shutter button halfway and turning the focusing ring. (Full-time manual

focus)

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When turning the focusing ring suddenly, the focus adjustment may be

delayed.

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The focus cannot be adjusted in MF mode while the camera is off.

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Do not touch the front rotating parts of the lens while autofocus is active.

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index of the dust cap, and turn

❷

❶

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❷

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❸

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