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© 2022.02 CANON INC.
BT1-D002-A-ENG
①
②
③
④
BACK FOCUS ADJUSMENT
NAMES OF PARTS
Focus drive gear
Zoom drive gear
Iris drive gear
Lens holder
F.B. Adjuster
PL mount
(FP type)
EF mount
(F type)
Attachment holder
1. Open the rubber cap of F.B. adjuster and loosen the
F.B. adjusting fixing
screw (black) using the standard
screwdriver.
2.
Select an object at an appropriate distance (approx.
0.9
-
1.8 m, 3
-
6 ft). Use any object with sharp contrast to
facilitate the adjustment work.
3. Set the iris fully open.
4. Set the lens to the telephoto angle by turning the zoom
ring.
5. Bring the object into focus by turning the focus ring.
6. Set the lens to the widest angle by turning the zoom ring.
7. Turn the F.B. adjusting screw (gold) with a standard
screwdriver to focus.
8. Repeat steps 4 to 7 a few times until the object is
brought into focus both at the widest end and the
telephoto end.
9. After the back focus adjustment is completed, tighten the
F.B. adjusting fixing screw. Then close the rubber cap.
If the image formation plane of the lens and the focal plane of the camera are not aligned, the image will not be
in focus when zooming, resulting in out-of-focus images.
PL mount lenses are equipped with a LEMO 4-pin connector.
It connects to external devices that support Cooke
ʼ
s /i Technology.
①
Lens body
②
Lens cap
③
Rear lens cap
④
Attachment holder
⑤
Operation Manual
"
Before Using The Product
"
⑥
Operation Manual
"
Regulations
"
Make sure all of the following items are included in the packing box. If you find any item missing, please
contact your dealer or Canon Inc.
F.B. Adjusting Screw (Gold)
F.B. Adjustment
Fixing Screw (Black)
F.B. Adjuster
LEMO 4-pin
Connector
CN-E20-50mm T2.4 L F
/ CN-E20-50mm T2.4 L FP
Digital Cinema Lens
Before using the product, make sure to read the "GENERAL SAFETY INFORMATION" and be sure to use the
product correctly.
This product comes with the following documents:
• Operation Manua
l "
Before Using The Product
"
(Included with the product)
• Operation Manual
"
Regulations
"
(Included with the product)
• Operation Manual (Web)
•
Depth-of-field (Web)
ENG
OPERATION MANUAL
PRODUCT LIST
The illustrations in this manual show
CN-E20-50mm T2.4 L F unless otherwise specified.
The shapes of product may vary depending on models and specifications.
⑤
⑥
A variety of professional camera accessories are available using Φ15 mm and Φ19 mm rod adaptors.
(When using a Φ19 mm rod, attach the supplied attachment holder to the lens holder.)
1. Attach the lens to the camera tightly so that both mounting surfaces are
in complete contact.
2. Secure the attachment holder on the lens support using the clamping
screw supplied with the lens support.
3. Push the lens toward the camera until both mounting surfaces are in
complete contact and clamp the lens support to the rods.
MOUNTING AND CONNECTING
Lens support
Note
For details on how to attach the lens, refer to the camera's
operation manual as well.
For PL mount, read the following instructions before mounting the lens.
1.
The PL mount supports Cooke
ʼ
s /i Technology, so make sure that the camera is set to
“
/i
”
.
2. Do not mount the lens if the camera is set to a mount communication mode other than
“
/i
”
. Doing so
could result in malfunction.
Note
1. Before mounting the lens on the camera, make sure that the power of camera and the power of supply
equipment are turned off.
2. Be sure to use the lens holder when mounting the lens on a camera. Be sure to avoid applying
excessive weight to the lens mount when the lens is mounted on a lens support.
