Zeiss Compact Prime CP.2 35/T2.1, Compact Prime CP.2 100/T2.1 CF, Compact Prime CP.2 28/T2.1, Compact Prime CP.2 25/T2.9, Compact Prime CP.2 21/T2.9 Change Instructions
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Carl Zeiss
Compact Prime CP.2
Mount Change Instructions
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A | Adjusting the flange focal
distance of the lens
Congratulations on the purchase of this Compact Prime CP.2 lens set. We are
convinced that your new lenses will bring you much pleasure and success.
The Compact Prime CP.2 lenses are the latest members of the ZEISS family of lenses
for digital and film cameras. They deliver great flexibility by introducing interchange-
able mounts that allow the lenses to be used with a wide range of cameras, from
traditional cine to HDSLR systems. Available in five different mounts – PL, EF, F,
Micro 4/3 and E – this new family of ZEISS lenses enables cinematographers to be
completely free in their choice of camera systems. The Compact Prime CP.2 lenses
cover the full-frame image format without vignetting.
In this manual we take a Compact Prime CP.2 35mm/ T 2.1 with EF mount, scaled
in feet as an example to explain how to change a lens mount and the subsequent
matching of your lens to a DSLR camera. Proceed in the same sequences to switch
to any other CP.2 mount.
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B | Overview
General instructions
• The use of a T6 torque wrench with a torque of 0.4 Nm is strongly recommended. This
wrench can be purchased from Carl Zeiss (see appendix, page 17).
• Ensure that the environment is clean and free from dust so that no dust particles can
enter the lens during the following procedure.
• Smudges and fingerprints on the lens surface can be gently removed with a soft
brush and then with a dry and clean cotton cloth. The ZEISS lens cleaning kit will give
superior results and is highly recommended for this purpose.
• When matching the lens, ensure that the colored shims lie on top of each other in the
groove of the lens barrel and do not cover the screw holes.
• Please handle the shims carefully as they can easily kink or tear which makes them
unusable.
General drawing
Lens
Groove of the
lens barrel Torx screw(s)
Black EF adapter
ring with attached
silver support
bracket
Silver EF mount
including threaded
black inner ring
Shim
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C | Changing the mount
1. Remove the rear lens cap.
2. Remove the four torx screws of the silver EF mount with a T6 torque wrench and
place the mount and the screws on one side.
ȴ The size of the black inner ring depends on the focal length of the lens and is
securely fastened to the EF mount (or F, MFT or E Mount) at the factory.
3. Remove the eight torx screws of the black EF adapter ring and place the ring and
the screws on one side.
ȴ The silver support bracket is already installed on the EF adapter ring at the
factory and does not need to be removed.
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4. Now you see the colored shims in the groove of the black lens barrel.
5. Place the PL mount on the lens in such a way that the groove on the rear side of
the PL mount fi ts over the silver screw on the lens barrel.
6.
Tighten the eight torx screws with the T6 torque wrench using a torque of 0.4 Nm.
7. When the torx screws have been tightened, the lens can be fi tted to a camera
with a PL mount and used.
8. Check the fl ange focal distance of the lens (see section D) in combination with
your camera.
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Instructions on changing to an EF or to any other CP.2 mount
1. Ensure that the groove on the rear side of the black EF adapter ring fi ts over the
small screw of the lens barrel.
2. Place the silver EF mount on the EF adapter ring in such a way that the blue dot
on the mount has the same orientation as the ZEISS logo and the support bracket
points to the serial number on the lens barrel.
3. Please note the correct orientation of the F mount to the ZEISS logo.
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4. Please note the correct orientation of the Micro 4/3 and the E mount to the serial
number on the lens barrel.
5. Tighten the torx screws using a torque of 0.4 Nm.
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As the flange focal distance varies from camera type to camera type, it is necessary
to adjust the CP.2 lens to the camera used when changing the mount or camera
model (=shimming). In order to perform this adjustment, Carl Zeiss provides shims in
different thicknesses that are color coded.
When the mount has been unscrewed, these shims can be placed in a groove in the
lens barrel. Any possible combination of shims can be used to achieve the required
thickness and therefore the required flange focal distance. The lens already contains
shims when delivered.
ȴ Carl Zeiss recommends that the camera is set to the usual standard settings
(cf. works settings). You can obtain further details from the instruction manual
of the camera you use.
Procedure
In the following chapter we explain how to adjust your Compact Prime CP.2 to a
DSLRcamera.
1. Fasten the Carl Zeiss test chart on a wall at the appropriate test distance
(see tables on page 12 – 16; the test distance is depending on the focal length)
and ensure that the illumination is bright and uniform.
2. Mount the camera and lens on a tripod and level the camera, making sure that
the centre of the image is aligned with the centre of the Siemens star.
D | Adjusting the lens
to your camera
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3. Activate the live view of your camera, select the maximum magnifi cation.
4. Set the distance ring to the test distance according to the tables in the
appendix. This setting must not be changed during the adjustment process.
5. Set the aperture of the lens to full speed.
6.
Obtain maximum image sharpness on the live view by varying the distance
bet ween the test chart and the camera.
7. Now remeasure the distance between the image plane mark on the camera body
and the test chart (= the actual distance).
8. If the distance has changed, the fl ange focal distance of the lens must be
adjusted by using the colored shims.
ȴ You fi nd a list of tables in the appendix for each focal length to calculate the
resultant change of the fl ange focal distance.
9. Now remove the lens from the camera.
10. Remove the EF mount and EF adapter ring (cf. section C 2–4).
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11. Determine the total thickness of the shims that are already installed in the lens
groove. Increase or decrease the total shim thickness according to the tables in
the appendix by using a flat-bladed screw-driver or a pair of tweezers.
12. Place the black EF adapter ring on the lens barrel and tighten the screws using a
torque of 0.4 Nm.
13. The next step is to place the silver EF mount on the EF adapter ring and tighten
the screws using a torque of 0.4 Nm.
14. Recheck the flange focal distance of the lens (see section D) in combination with
the camera you use.
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E | Appendix
Table for shims to adjust Compact Prime CP.2 lenses
when used on digital cameras
Shim color Thickness [mm]
silver 0.013
gold 0.019
purple 0.025
light blue 0.032
red 0.038
blue 0.051
white 0.064
green 0.076
orange 0.102
light purple 0.127
clear 0.152
Example
• Using a Compact Prime CP.2 35mm/T2.1 lens with an EF mount, scaled in feet and
a test chart at a test distance of 4 ft, an actual distance of 4 ft 1’ is measured. Due
to the table on page 14, a silver shim 0.013 mm must therefore be added to the total
thickness of the shims.
Note
• Any combination of shims is possible to achieve the required thickness and
therefore the desired flange focal distance.
• Always use the closest possible combination of shims.
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Tables for adjusting the flange focal distance
of Compact Prime CP.2 lenses
All Compact Prime CP.2 lenses cover the full-frame image format (24 x 36 mm),
ANSI Super 35 and Normal 35 image format, except the CP.2 18mm/T3.6. This lens
covers the ANSI Super 35 and Normal 35 image format.
Key
• Minus sign: Shims must be removed
• Plus sign: Shims must be added
Compact Prime CP.2 18/T3.6
Meter distance scale Feet distance scale
Distance to test chart [mm]: 1000 Distance to test chart [ft]: 4
Object distance
at best focus [mm]:
Change of total
shim thickness [mm]:
Object distance
at best focus [ft]:
Change of total
shim thickness [mm]:
900 -0.04 3ft 8’ -0.03
925 -0.03 3ft 9' -0.02
950 -0.02 3ft 10' -0.01
975 -0.01 3ft 11' -0.01
1000 0.00 4ft 0' 0.00
1025 +0.01 4ft 1' +0.01
1050 +0.02 4ft 2' +0.01
1075 +0.03 4ft 3' +0.02
1100 +0.04 4ft 4' +0.03
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Compact Prime CP.2 21/T2.9
Meter distance scale Feet distance scale
Distance to test chart [mm]: 1000 Distance to test chart [ft]: 4
Object distance
at best focus [mm]:
Change of total
shim thickness [mm]:
Object distance
at best focus [ft]:
Change of total
shim thickness [mm]:
940 -0.04 3ft 8' -0.04
955 -0.03 3ft 9' -0.03
970 -0.02 3ft 10' -0.02
985 -0.01 3ft 11' -0.01
1000 0.00 4ft 0' 0.00
1015 +0.01 4ft 1' +0.01
1030 +0.02 4ft 2' +0.02
1045 +0.03 4ft 3' +0.03
1060 +0.04 4ft 4' +0.04
Compact Prime CP.2 25/T2.9
Meter distance scale Feet distance scale
Distance to test chart [mm]: 1000 Distance to test chart [ft]: 4
Object distance
at best focus [mm]:
Change of total
shim thickness [mm]:
Object distance
at best focus [ft]:
Change of total
shim thickness [mm]:
960 -0.03 3ft 8' -0.05
970 -0.02 3ft 9' -0.04
980 -0.02 3ft 10' -0.03
990 -0.01 3ft 11' -0.01
1000 0.00 4ft 0' 0.00
1010 +0.01 4ft 1' +0.01
1020 +0.02 4ft 2' +0.03
1030 +0.02 4ft 3' +0.04
1040 +0.03 4ft 4' +0.05
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Compact Prime CP.2 28/T2.1
Meter distance scale Feet distance scale
Distance to test chart [mm]: 1000 Distance to test chart [ft]: 4
Object distance
at best focus [mm]:
Change of total
shim thickness [mm]:
Object distance
at best focus [ft]:
Change of total
shim thickness [mm]:
960 -0.04 3ft 10' -0.03
970 -0.03 3ft 10 1/2' -0.03
980 -0.02 3ft 11' -0.02
990 -0.01 3ft 11 1/2' -0.01
1000 0.00 4ft 0' 0.00
1010 +0.01 4ft 1' +0.01
1020 +0.02 4ft 1 1/2' +0.02
1030 +0.03 4ft 2' +0.03
1040 +0.04 4ft 2 1/2' +0.03
Compact Prime CP.2 35/T2.1
Meter distance scale Feet distance scale
Distance to test chart [mm]: 1000 Distance to test chart [ft]: 4
Object distance
at best focus [mm]:
Change of total
shim thickness [mm]:
Object distance
at best focus [ft]:
Change of total
shim thickness [mm]:
980 -0.03 3ft 10' -0.05
985 -0.02 3ft 10 1/2' -0.04
990 -0.02 3ft 11' -0.03
995 -0.01 3ft 11 1/2' -0.01
1000 0.00 4ft 0' 0.00
1005 +0.01 4ft 1' +0.01
1010 +0.02 4ft 1 1/2' +0.03
1015 +0.02 4ft 2' +0.04
1020 +0.03 4ft 2 1/2' +0.05
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Compact Prime CP.2 50/T2.1 and CP.2 50/T2.1 Makro
Meter distance scale Feet distance scale
Distance to test chart [mm]: 1500 Distance to test chart [ft]: 5
Object distance
at best focus [mm]:
Change of total
shim thickness [mm]:
Object distance
at best focus [ft]:
Change of total
shim thickness [mm]:
1480 -0.03 4ft 11' -0.03
1485 -0.02 4ft 11 1/4' -0.03
1490 -0.01 4ft 11 1/2' -0.02
1495 -0.01 4ft 11 3/4' -0.01
1500 0.00 5ft 0' 0.00
1505 +0.01 5ft 1/4' +0.01
1510 +0.01 5ft 1/2' +0.02
1515 +0.02 5ft 3/4' +0.03
1520 +0.03 5ft 1' +0.03
Compact Prime CP.2 85/T2.1
Meter distance scale Feet distance scale
Distance to test chart [mm]: 1500 Distance to test chart [ft]: 5
Object distance
at best focus [mm]:
Change of total
shim thickness [mm]:
Object distance
at best focus [ft]:
Change of total
shim thickness [mm]:
1492 -0.03 4ft 11 4/8' -0.05
1494 -0.02 4ft 11 5/8' -0.04
1496 -0.02 4ft 11 6/8' -0.02
1498 -0.01 4ft 11 7/8' -0.01
1500 0.00 5ft 0' 0.00
1502 +0.01 5ft 1/8' +0.01
1504 +0.02 5ft 2/8’ +0.02
1506 +0.02 5ft 3/8' +0.04
1508 +0.03 5ft 4/8' +0.05
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Compact Prime CP.2 100/T2.1 CF
Meter distance scale Feet distance scale
Distance to test chart [mm]: 2000 Distance to test chart [ft]: 7
Object distance
at best focus [mm]:
Change of total
shim thickness [mm]:
Object distance
at best focus [ft]:
Change of total
shim thickness [mm]:
1987 -0.04 6ft 11 4/8' -0.03
1990 -0.03 6ft 11 5/8' -0.02
1993 -0.02 6ft 11 6/8' -0.02
1997 -0.01 6ft 11 7/8' -0.01
2000 0.00 7ft 0' 0.00
2003 0.01 7ft 1/8' 0.01
2007 0.02 7ft 2/8' 0.02
2010 0.03 7ft 3/8' 0.03
2013 0.04 7ft 4/8' 0.03
Compact Prime CP.2 – Accessories and spare parts
All interchangeable mount sets include: mount, lens caps, adaption ring with support
bracket, screws and a set of shims CP.2.
Accessories/spare parts Ident-
No.
EF mount
Interchangeable Mount Set EF (for CP.2 18/T3.6 or CP.2 25/T2.9) 1849-490
Interchangeable Mount Set EF (for CP.2 21/T2.9 or CP.2 28/T2.1 or CP.2 35/T2.1) 1846-492
Interchangeable Mount Set EF (for CP.2 50/T2.1 or CP.2 85/T2.1) 1846-494
Interchangeable Mount Set EF (for CP.2 50/T2.1 Makro) 1846-496
Interchangeable Mount Set EF (for CP.2 100/T2.1 CF) 1846-499
PL mount
Interchangeable Mount Set PL (for CP.2 18/T3.6 or CP.2 25/T2.9) 1846-489
Interchangeable Mount Set PL (for CP.2 21/T2.9 or CP.2 28/T2.1 or CP.2 35/T2.1) 1846-491
Interchangeable Mount Set PL (for CP.2 50/T2.1 or CP.2 85/T2.1) 1846-493
Interchangeable Mount Set PL (for CP.2 50/T2.1 Makro) 1846-495
Interchangeable Mount Set PL (for CP.2 100/T2.1 CF) 1846-498
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Accessories/spare parts Ident-
No.
F mount
Interchangeable Mount Set F (for CP.2 18/T3.6 or CP.2 25/T2.9) 1871-042
Interchangeable Mount Set F (for CP.2 21/T2.9 or CP.2 28/T2.1 or CP.2 35/T2.1) 1871-043
Interchangeable Mount Set F (for CP.2 50/T2.1 or CP.2 85/T2.1 or CP.2 50/T2.1 Makro) 1871-046
Interchangeable Mount Set F (for CP.2 100/T2.1 CF) 1871-044
Micro 4/3 mount
Interchangeable Mount Set MFT (for CP.2 18/T3.6 or CP.2 25/T2.9) 1889-230
Interchangeable Mount Set MFT (for CP.2 21/T2.9 or CP.2 28/T2.1 or CP.2 35/T2.1) 1889-231
Interchangeable Mount Set MFT (for CP.2 50/T2.1 or CP.2 85/T2.1) 1889-232
Interchangeable Mount Set MFT (for CP.2 50/T2.1 Makro) 1889-233
Interchangeable Mount Set MFT (for CP.2 100/T2.1 CF) 1889-234
E mount
Interchangeable Mount Set E (for CP.2 18/T3.6 or CP.2 25/T2.9) 1907-608
Interchangeable Mount Set E (for CP.2 21/T2.9 or CP.2 28/T2.1 or CP.2 35/T2.1) 1907-609
Interchangeable Mount Set E (for CP.2 50/T2.1 or CP.2 85/T2.1) 1907-610
Interchangeable Mount Set E (for CP.2 50/T2.1 Makro) 1907-611
Interchangeable Mount Set E (for CP.2 100/T2.1 CF) 1907-612
CP.2 Transport Case
(external dimensions: 56 x 45.5 x 26.5 cm (22.06” x 17.93” x 10.43”))
1856-822
Support Bracket EF, F, MFT, E (incl. screws) 1856-667
Torx torque wrench (T6, torque moment 0.4 Nm) 0520-065
Torx Pan-Head screw (M2 x 8 -SUS 410; 50 pcs.) 500-022
Front Lens Cap EF, PL, F, MFT, E 0097-227
Rear Lens Cap EF 1793-167
Rear Lens Cap PL 102160-
0052-000
Rear Lens Cap F 1793-178
Rear Lens Cap MFT 1889-118
Rear Lens Cap E 1907-145
Siemens Star test chart (DIN A3, laminated) 1849-755
Set of shims CP.2 1853-634
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For your notes
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Carl Zeiss AG reserves the right to make changes to the published specifications without prior notice.
All rights reserved. No part of this material may be reproduced, stored in retrieval systems, or transmitted, in
any form or by any means, electronic, mechanical, photocopy, recording or otherwise without the prior written
consent of Carl Zeiss. Copyright 03/2011, Carl Zeiss AG
EN_10_070_712II Printed in Germany AW-CZ-III/2011 Poo
Subject to change.
For further information, please contact us:
Carl Zeiss AG
Camera Lens Division
73446 Oberkochen
Germany
cine@zeiss.de
www.zeiss.com/cine
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