2/2
© 2022.02 CANON INC.
BT1-D002-A-ENG
CANON INC.
30-2, Shimomaruko 3-chome, Ohta-ku, Tokyo 146-8501, Japan
GENERAL SAFETY INFORMATION
The safety warnings and cautions provided on the product or in this operation manual must be observed. Failure
to observe these warnings and cautions may result in injury or accident. Read this operation manual carefully to
familiarize yourself with its contents and ensure that you can operate the product properly.
Also, store this manual in a safe place where it can easily be referenced whenever necessary.
This operation manual uses the following symbols and terms to identify hazards in order to prevent accidents.
WARNING
This indicates a potentially hazardous situation which, if not heeded, may result in death
or serious injury to you or others. Be sure to heed all warning notices to ensure safe
operation at all times.
CAUTION
This indicates a potentially hazardous situation which, if not heeded, may result in a mi-
nor injury to you or others, or damage to property.
NOTE
This indicates cautions and recommendations for operation. It contains information
which, if not heeded, may result in this product failing to function properly. These no-
tices also contain useful information for operation.
HANDLING THE PRODUCT
WARNING
Do not stare at the sun or other bright objects through the lens. It may injure your eyes.
CAUTION
1. Ensure that all mountings are securely tightened. If a mounting becomes loose, parts may fall off and cause
injury.
2. Inspect mountings regularly (about every six months to one year) to ensure they are securely tightened. If a
mounting becomes loose, parts may fall off and cause injury.
NOTE
1. Do not expose the lens to strong impact. Striking or dropping the lens may cause the malfunction of the
product.
2. This product is not waterproof. Take measures to avoid direct contact with rain, snow, or moisture. Otherwise
it may cause the malfuction of the product.
3. Take measures to avoid sudden changes in temperature where the lens is used, which may prevent
operation temporarily if condensation forms in the lens.
DEALING WITH ABNORMALITIES
WARNING
If any of the following situations occurs, immediately dismount the lens from the camera and contact your
Canon sales representative or dealer.
• Smoke, fumes, or unusual noises
• Entry of foreign objects (such as liquid or metal objects) inside the product
MAINTENANCE AND INSPECTION
NOTE
1. Clean off any dust on the lens surface using a lens blower or a soft lens brush. In case of getting fingerprints
or stains on the lens, use a clean cotton cloth moistened with commercial lens cleaning fluid, or use lens
cleaning paper. Gently wipe in a spiral pattern from the center of the lens. Be careful not to rub dust across
the lens, which may scratch the lens surface.
2. Routine inspection about once a year is recommended, depending on the conditions and environment of use.
Request overhaul, if needed.
STORAGE
CAUTION
Always attach the lens cap, hood cap, dust cap or covers before storage. Storing the lens without the caps
or covers attached poses a risk of fire if the lens concentrate light in direct sunlight.
NOTE
Immediately wipe off any moisture on the lens from misty or foggy environments, using a dry cloth. Seal the
lens in a plastic bag with a desiccant (preferably new) to prevent moisture inside. Otherwise it may cause
the mold or the malfunction of the product.
TO THE CUSTOMER
1. Canon shall bear no responsibility for damage resulting from improper operation of this product by the
customer.
2. Canon shall make no guarantees about the product quality, functions, or operation manual and its marketability
and suitability for the customer’s purpose. Moreover, Canon shall bear no responsibility for any damage, direct
or incidental, that results from usage for the customer’s purpose.
3. The product specifications, configuration, and appearance are subject to change without prior notice.
4. For further information on repairs, maintenance, or adjustments not mentioned in this operation manual, contact
your Canon sales representative or dealer.
5. Note that Canon may be unable to undertake servicing or repair of a product if it is modified without consulting
Canon or your Canon sales representative.
All rights reserved. No part of this operation
manual may be reproduced or copied in any
from or by any means without the written
permission of Canon Inc.
EXTERNAL VIEW
F type
（
EF mount
）
SPECIFICATIONS
CN-E20-50mm T2.4 L F (EF mount)
CN-E20-50mm T2.4 L FP (PL mount)
Focal Length
20-50 mm
Maximum Relative Aperture (T no)
1:2.4
Iris Blade
11
Image size
Φ46.4 mm
Image Coverage
（
H / V
）
35.7×20.1 mm
38.1×20.1 mm
36×24 mm
40.96×21.6 mm
Aspect Ratio
1.78 : 1
1.9 : 1
1.5 :1
1.9 : 1
Angular Field of
View
（
H / V
）
Wide angle
end
83.5°×53.4°
87.2°×53.4°
84.0°×61.9°
91.4°×56.7°
Telephoto end
39.3°×22.7°
41.7°×22.7°
39.6°×27.0°
44.5°×24.4°
Minimum Object Distance
(M.O.D.)
0.6 m, 2 ft (from the image sensor)
Object Dimensions
at M.O.D.
（
H / V
）
Wide angle
end
64.9×36.6 cm
69.3×36.6 cm
65.5×43.7 cm
74.5×39.3 cm
Telephoto end
24.7×13.9 cm
26.4×13.9 cm
24.9×16.6 cm
28.4×15.0 cm
Front Diameter
Φ114 mm
Thread for filters
Φ112 mm
P1.0
Size
(W × H × L)
Approx. 131.2
×133.6×241.3 mm (EF mount)
Approx. 131.2
×133.6×233.3 mm (PL mount)
Weight
Approx.
3.3 kg
* A variety of professional camera accessories compatible with the
Φ
15 mm and
Φ
19 mm rod system can be used with this lens.
12
115.6
UNIC1/4-20
241.3
8
155
100.1
62.7
6
7
5.5
φ
11
4
φ
54
133.6
68
27
φ
17
UNIC3/8-16
（
Unit : mm
）
133.6
68
12
107.6
UNIC1/4-20
233.3
8
147
92.1
54.7
6
7
13.3
φ
11
4
φ
54
133.6
68
27
φ
17
UNIC3/8-16
（
Unit : mm
）
2
Note
This lens is a full manual lens for shooting movies.
• When used to shoot still images or when manual operations are performed in AE or other Auto modes, the lens may not
operate properly or the indications may not be correct.
• Do not operate the lens during initialization of the camera settings.
• This lens is developed primarily for movie production, and have a color balance typical for movies. This means that the color
reproduction is warmer than that of EF lenses which are basically used to shoot still images. Therefore, when using both
types of lens together, adjust the color balance (redo the white balance etc.) as necessary.
• In general, the depth of field becomes shallow and the focusing range becomes extremely narrow near the widest aperture
and when shooting a subject at close range. In addition, this tendency increases for lenses with longer focal lengths. When
shooting images, carefully check the focusing condition using the zoom mode of the finder or other means, and shoot a
sufficient number of test images before performing focus operations.
(for EF mount Lens only)
• The T number is printed on the iris ring of this lens, but the F value may be displayed on the camera side.
• Information of the focal length displayed on the camera side omits the figures below the decimal point.
FP type
（
PL
mount
）
Focus drive gear
Zoom drive gear
Iris drive gear
Number of teeth
162
148
140
Module
0.8
0.8
0.8
P.C.D.
129.6 mm
118.4 mm
112 mm
Angular rotation
300°
93.5°
55°
Spur gear specifications
