Canon EF 20mm f/2.8 USM Manual

Canon Linse EF 20mm f/2.8 USM

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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

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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

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To shoot in manual focus (MF) mode, set the focus mode switch

to MF, and focus by turning the focusing ring. The focusing ring

always works, regardless of the focus mode.

• After autofocusing in ONE SHOT AF mode, focus manually by

pressing the shutter button halfway and turning the focusing

ring (Full-time manual focus)

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3. Innity Compensation Mark

To compensate for shifting of the infinity focus point that results

from changes in temperature.

The infinity position at normal temperature is the point at which the

vertical line of the L mark is aligned with the distance indicator on

the distance scale

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• For accurate focusing in MF on subjects at infinity distance, look

through the viewfinder while rotating the focusing ring.

4. Infrared Index

The infrared index corrects the focus setting when using

monochrome nfrared film. Focus on the subject in MF, then

adjust the distance setting by moving the focusing ring to the

corresponding infrared index mark

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• Some EOS cameras cannot use infrared film. See the instructions

for your EOS camera.

• The infrared index position is based on a wavelength of 800 nm.

• Be sure to observe the manufacturer’s instructions when using

infrared film.

• Use a red filter also when you take the picture.

Nomenclature

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Distance scale

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Infrared index

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Distance index

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Contacts

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Lens mount index

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Focus mode switch

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Focusing ring

EF Lenses

EF14mm f/2.8L USM

EF20mm f/2.8 USM

EF24mm f/1.4L USM

EF28mm f/1.8 USM

EF35mm f/1.4L USM

EF50mm f/1.4 USM

EF85mm f/1.8 USM

EF100mm f/2 USM

EF200mm f/2.8L USM

Instructions

Produkt Specifikationer

Mærke:	Canon
Kategori:	Linse
Model:	EF 20mm f/2.8 USM
Vægt:	405 g
Produktfarve:	Sort
Diameter:	77.5 mm
Forstørrelse:	0.14 x
Grænseflade til montering af objektiv:	Canon EF
Længde:	70.6 mm
Nærmeste fokuseringsafstand:	0.25 m
Maksimale blænderåbning tal:	22
Fast brændvidde:	20 mm
Komponent til:	SLR
Objektivstruktur (elementer/grupper):	11/9
Objektivtype:	Ultra bredlinse
Filterstørrelse:	72 mm
Antal membranblade:	5
AF aktuator:	USM
Objektivets synsvinkel, diagonal:	94 °
Objektivets synsvinkel, vandret:	84 °
Objektivets synsvinkel, lodret:	62 °