ZEISS Lightweight Zoom LWZ.3
ZEISS Lightweight Zoom LWZ.3
Mount Change Instructions
Table of Contents
Introduction
3
Explanation of Symbols
Overview
Delivery Contents of a ZEISS LWZ.3
Technical Data
3
4
4
5
Changing the Mount of a ZEISS LWZ.3
6
Detaching a Mount
Attaching a Mount
Adjusting a ZEISS LWZ.3 to Your Digital Camera
Testing the Sharpness
Correcting the Flange Focal Distance
Appendix
Color Code of the Shims
Shimming Table
Mount Change Accessories
Glossary
2
6
10
15
16
19
21
21
21
22
23
Introduction
In this manual you learn how to change the mount of a ZEISS Lightweight Zoom LWZ.3 21-100/
T2.9-3.9 T* (abbreviation: ZEISS LWZ.3) and how to match it to a digital camera. In order to
explain the procedure, this manual uses a ZEISS LWZ.3, which is scaled in feet with PL mount.
Proceed in the same sequences to switch from or to any other mount that is available for the
ZEISS LWZ.3 (Canon1 EF, Nikon2 F, Sony3 E and MFT).
Explanation of Symbols
The information symbol indicates additional information, which is useful for the context.
The skip symbol indicates that under certain circumstances you can skip certain steps.
The result symbol indicates information about the obtained result of a step.
The warning symbol indicates dangerous situations and actions, which might impair the functionality of
the product, damage the product or hurt the user.
1
Canon is a trademark or registered trademark of Canon Inc. and/or other members of the Canon Group.
2
Nikon is a registered trademark of Nikon Corporation
3
Sony and E-mount are registered trademarks of Sony Corporation
3
Overview
1
2
3
4
5
6
7
8
front lens
focus ring
lens foot
index mark
aperture ring
zoom ring
lens barrel
small screw
9
10 11 12 13 14 15 5
1
2
3
4
Delivery Contents of a ZEISS LWZ.3
•
•
•
•
•
4
1x
1x
1x
1x
3x
ZEISS LWZ.3
Front cap
Rear cap
Focus lever
Lens support riser 3/8”
6
electrical contact
rear lens
groove of the lens
shims
mount including the black inner ring
T3 screws
T6 screws
9
7
8
11
10
12
13
14
15
Technical Data
ZEISS Lightweight Zoom LWZ.3
Focal length
21–100 mm
Aperture range
2.9 to 22
Lens elements / Groups
22 lenses / 18 groups
Close focus
0.8 m / 2'8"
1
Rotation angle of focusing ring
(inf – MOD)
294°
Zoom rotation angle
100°
Aperture rotation angle
48°
Front diameter
114 mm / 4.49"
Length
226 mm / 8.9"
2
Weight
2.0 kg / 4.4 lbs
Aperture blades
11
Coverage
ANSI Super 35 / 31.1mm
Mounts
PL, EF, E, MFT, F
Horizontal Angle of View
61– 9°
Super 35
61–14°
3
Normal 35
APS-C
4
5
MFT 6
55–12°
56–13°
45– 9°
1
Close focus distance is measured from the image plane
2
Front to PL-mount flange
3
Horizontal angle of view for an ANSI Super 35 Silent camera
(aspect ratio 1:1.33, dimensions 24.9 mm x 18.7 mm / 0.98" x 0.74")
4
Horizontal angle of view for a Normal 35 Academy camera
(aspect ratio 1:1.37, dimensions 22 mm x 16 mm / 0.87" x 0.63")
5
Horizontal angle of view for an APS-C camera
(aspect ratio 1:1.50, dimensions 22.3 mm x 14.9 mm / 0.88" x 0.59")
6
Horizontal angle of view for a Micro 4/3 (MFT) camera
(aspect ratio 1:1.33, dimensions 17.3 mm x 13 mm / 0.68" x 0.51")
5
Changing the Mount of a ZEISS LWZ.3
In this chapter you learn how to change the mount of a ZEISS LWZ.3. The procedure consist of
2 parts which are both mandatory to successfully change a mount. You learn how to detach the
currently attached mount and how to attach a different mount. To make sure the ZEISS LWZ.3
works properly, additionally complete the subsequent procedure:
Adjusting a ZEISS LWZ.3 to Your Digital Camera.
Detaching a Mount
You need
ZEISS LWZ.3
ZEISS T6 torque wrench with a torque of 0.4 Nm
alternatively: regular T6 torque wrench with a torque of 0.4 Nm
ZEISS T3 torque wrench with a torque of 0.05 Nm
alternatively: regular T3 torque wrench with a torque of 0.05 Nm
ZEISS Interchangeable Mount Set for ZEISS LWZ.3
The use of tools offered by ZEISS is highly recommended. You can purchase these tools directly from ZEISS
or your trusted ZEISS dealer. See Mount Change Accessories
Requirements
Ensure that your working space is flat and leveled, in order to prevent the lens from tilting and falling over.
Ensure that the environment is clean and free from dust so that no dust particles enter the ZEISS LWZ.3.
Ensure that the front lens cap sits on your ZEISS LWZ.3, in order to avoid scratches.
6
1. Place your ZEISS LWZ.3 on a flat surface with the mount facing up and the serial number facing away from you.
The serial number is located at the side of the lens foot.
The serial number varies.
2. Remove the rear lens cap.
You can now see the mount.
If you are changing from any other mount than a PL mount,
skip step 3 since the electrical contact is not exposed on other mounts.
3. With a T3 torque wrench remove the 2 smaller and shorter torx screws which hold the electrical contact.
7
4. With a T6 torque wrench remove the remaining torx screws of the mount.
The black inner ring is securely fastened to the mount at the ZEISS factory and does not need to be removed.
The mount is now loose.
5. Carefully detach the mount from your ZEISS LWZ.3.
If you are changing from a PL mount, you can directly see the shims.
If you are changing from any other mount than a PL mount, you can now see the black adapter ring.
If you are changing from a PL mount, skip Step 6 and 7, since the PL mount doesn´t have an adapter ring.
8
6. With a T6 torque wrench remove the torx screws of the black adapter ring.
The shape and height of the black adapter ring varies according to the different mounts.
The black adapter ring is now loose.
7. Detach the black adapter ring from your ZEISS LWZ.3.
1
2
3
1
groove of the lens 2
shims 3
small screw in the groove of the lens
Now you see the shim(s) and a small screw in the groove of the lens barrel.
You successfully detached the mount.
When detaching the mount for the first time, do not remove the shims.
Never remove the small screw in the groove of the lens.
9
Attaching a Mount
You need
ZEISS LWZ.3
ZEISS T6 torque wrench with a torque of 0.4 Nm
ZEISS T3 torque wrench with a torque of 0.05 Nm
ZEISS Interchangeable Mount Set for ZEISS LWZ.3
The use of tools offered by ZEISS is highly recommended. You can purchase these tools directly from ZEISS
or your trusted ZEISS Dealer. See Mount Change Accessories
Requirements
Ensure that your working space is flat and leveled, in order to prevent the lens from tilting and falling over.
Ensure that the environment is clean and free from dust so that no dust particles enter the ZEISS LWZ.3.
Ensure that the front lens cap sits on your ZEISS LWZ.3, in order to avoid scratches.
Make sure you successfully completed Part 1: Detaching a Mount
10
If you are changing to a PL mount, skip Steps 1 and 2 in this chapter.
1. Carefully place the adapter ring, which came with your ZEISS Interchangeable Mount Set for the ZEISS LWZ.3.
Make sure the small screw in the groove of the ZEISS LWZ.3 sinks into groove of the adapter ring and the electrical
contact fits into the recess.
The shape and height of the black adapter ring varies according
to the different mounts.
2. With the T6 torque wrench tighten the torx screws using a torque of 0.4 N
11
3. Place the mount on your ZEISS LWZ.3:
3.I PL mount: Place the PL mount on the ZEISS LWZ.3 in such a way that the recess of the mount lays on top of the
electrical contact. The groove on the other side of the PL mount should then also lay on top of the small screw on
the lens barrel. Screw in the 2 shorter T3 screws to fix the electrical contact.
3.II EF mount: Place the silver EF mount on the adapter ring in such a way that the notch aligns with the index mark.
12
3.III F mount: Place the F mount on the adapter ring in such a way that the notch aligns with the index mark.
3.IV MFT mount: Place the MFT mount on the adapter ring in such a way that the notch aligns with the index mark.
13
3.V E mount: Place the E mount on the adapter ring in such a way that the blue dot aligns with the index mark.
4. With the T6 torque wrench tighten the torx screws using a torque of 0.4 N
You now successfully changed the mount of a ZEISS LWZ.3.
In this chapter you learned how to detach the mount of your ZEISS LWZ.3 and attach a new mount to your ZEISS
LWZ.3. To make sure your ZEISS LWZ.3 works properly, also complete the subsequent procedure: Adjusting a ZEISS
LWZ.3 to Your Digital Camera 14
Adjusting a ZEISS LWZ.3 to Your Digital Camera
In the following chapter you learn how to adjust your ZEISS LWZ.3 to a digital camera.
This is necessary to ensure that the ZEISS LWZ.3 works properly and delivers the maximum
image quality. In order to perform this adjustment, ZEISS provides shims in different colors
which indicate their thickness.
You need:
Tripod
Digital camera with live view
ZEISS LWZ.3 that needs to be adjusted
Siemens star test chart
Measuring tape or folding ruler
Flat-blade screwdriver
At least 3,5 m or 12 ft of free space
ZEISS Interchangeable Mount Set for ZEISS LWZ.3
alternatively: ZEISS Shims set
The use of tools offered by ZEISS is highly recommended. You can purchase these tools
directly from ZEISS or your trusted ZEISS Dealer. See Mount Change Accessories
Requirements:
Make sure that the front and rear lens of the ZEISS LWZ.3 are clean.
Ensure that the illumination is bright and uniform.
Set your camera to standard settings (cf. work settings)
Smudges and fingerprints on the lens surface can gently be 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. For further information,
please watch our tutorial on how to clean your lens. https://youtu.be/syOzecbtuwg
15
Testing the Sharpness
1. Fasten the siemens star test chart on a wall.
2. Mount the ZEISS LWZ.3 on the camera.
3. Mount the camera on a tripod.
4. Position your camera at the testing distance of 3 m or 10 ft.
The testing distance is measured from the siemens star test chart
to image plane on your camera.
5. Level the camera.
16
6. Set the aperture of the ZEISS LWZ.3 to T2.9 by rotating the aperture ring.
The aperture setting must not be changed during the adjustment process.
7. Activate the live view of your camera.
8. Select the maximum magnification of the live view.
9. Make sure that the center of the image aligns with the center of the siemens star test chart.
10. Set the focal distance of the ZEISS LWZ.3 to 100 mm by rotating the zoom ring.
11. Set the focus ring to 3 m or 10 ft.
12. Turn the focus ring to determine if the sharpness is located below 3 m/10 ft or above 3 m/10 ft.
This will give you an idea if you need to reduce or enlarge the distance of the camera to the
siemens star test chart. You will need this information in a further step.
If you achieve the maximum sharpness at 3 m/10 ft, you successfully tested your ZEISS LWZ.3.
No further steps are required.
13. Again, set the focus ring to 3 m or 10 ft.
17
14. Reduce or enlarge the distance between the siemens star test chart and the image plane of the camera by a
maximum of 5 cm or 2" to obtain maximum image sharpness on the live view. Keep the focus ring at 3 m /10 ft.
• If you measured the sharpness below 3 m /10 ft you need to reduce the distance between the test chart
and the image plane of the camera.
• If you measured the sharpness above 3 m /10 ft you need to enlarge the distance between the test chart
and the image plane of the camera.
15. Now remeasure the testing distance between the image plane mark on the camera body and the test chart
(= the actual distance)
• If the testing distance has changed, note the distance. The change indicates that the flange focal distance
of the ZEISS LWZ.3 must be adjusted. Proceed with the steps in Correcting the Flange Focal Distance.
Do not take down the setup as you will need it again to recheck the sharpness later in the process.
18
Correcting the Flange Focal Distance
1. Remove the ZEISS LWZ.3 from the camera.
2. Follow the steps of chapter Detaching a Mount.
3. Determine the total thickness of the shims that already lay in the lens groove.
4. Increase or decrease the total shim thickness according to the Shimming Table in the appendix.
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.
Example: Using a ZEISS LWZ.3 with an EF mount, scaled in feet and a test chart at a test distance of 10 ft,
an actual distance of 10 ft 1´ is measured. Due to the shimming tables, you add a light blue shim 0.03 mm
to the total thickness of the shims.
19
5. Use a flat-bladed screwdriver or a pair of tweezers to remove or add shims.
Handle the shims carefully as they can easily kink or tear which makes them unusable.
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. The shims might otherwise be damaged, while screwing in the screws.
6. Follow the steps of chapter Attaching a Mount to attach a new mount.
7. Recheck the sharpness of the lens by following the steps of chapter Testing the Sharpness once more.
Check the sharpness at both 100 mm and 21 mm.
a. If the testing distance has changed, follow the steps of chapter Correcting the Flange Focal Distance once more.
b. If you achieve the maximum sharpness over the whole focal range, you successfully tested your ZEISS LWZ.3.
In this chapter you learned how to adjust a ZEISS LWZ.3.
20
Appendix
Color Code of the Shims
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
Shimming Table
Minus sign: Enlarge the flange focal distance.  Remove Shims
Plus sign: Reduce the flange focal distance.  Add Shims
Meter distance scale
Feet distance scale
Distance to test chart [mm]
3000
Distance to test chart [ft]
10
Object distance
at best focus [mm]
Change of total
washer thickness [mm]
Object distance
at best focus [ft]
Change of total
washer thickness [mm]
2960
-0,05
9ft 10’
-0,06
2970
-0,04
9ft 10 1/2’
-0,05
2980
-0,02
9ft 11’
-0,03
2990
-0,01
9ft 11 1/2’
-0,02
3000
0,00
3010
+0,01
10ft 1/2’
+0,02
3020
+0,02
10ft 1 ‘
+0,03
3030
+0,04
10ft 1 1/2’
+0,05
3040
+0,05
10ft 2’
+0,06
10ft 0’
0,00
21
Mount Change Accessories
Accessories
ZEISS Identification Number
Interchangeable Mount Set PL for LWZ.3
2152-131
Interchangeable Mount Set EF
2152-130
Interchangeable Mount Set F
2152-133
Interchangeable Mount Set E
2152-132
Interchangeable Mount Set MFT
2152-134
Front Lens Cap ZEISS LWZ.3
2153-707
Rear Lens Cap PL
102160-0052-000
Rear Lens Cap EF
1793-167
Rear Lens Cap F
1793-178
Rear Lens Cap E
1907-145
Rear Lens Cap MFT
1889-118
Torx torque wrench (T6, torque moment 0,4 Nm)
0520-065
Torx torque wrench (T3, torque moment 0,5 Nm)
0604-200
ZEISS Siemens Star Test Chart
1849-755
Colored Shims ZEISS LWZ.3 (Set)
2143-589
22
Glossary
Flange focal distance
flange-to-film distance, flange focal depth, flange back distance, flange focal length
Shim
washer
Index mark
aperture indicator, aperture line, aperture mark, aperture index
Flat-blade screwdriver
slotted screwdriver, flathead screwdriver
23
Carl Zeiss AG
Camera Lenses
73446 Oberkochen
Germany
Phone +49 7364 20-6175
Fax: +49 7364 20-4045
www.zeiss.com/cine
EN_10_070_0004I Printed in Germany CZ-VIII/2017
Subject to change in design and scope of delivery and as a result of ongoing technical development.
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