Zeiss Compact Prime CP.2 Manuel utilisateur
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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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