Zeiss Lightweight Zoom LWZ.3 User manual

ZEISS Lightweight Zoom LWZ.3
Mount Change Instructions

Table of Contents
Introduction 3
Explanation of S mbols 3
Overview 4
Deliver Contents of a ZEISSLWZ.3 4
Technical Data 5
Changing the Mount of a ZEISS LWZ.3 6
Detaching a Mount 6
Attaching a Mount 10
Adjusting a ZEISS LWZ.3 t o Your Digital Camera 15
Testing the Sharpness 16
Correcting the Flange Focal Distance 19
Appendix 21
Color Code of the Shims 21
Shimming Table 21
Mount Change Accessories 22
Glossar 23

Explanation of S mbols
The information s mbol indicates additional information, which is useful for the context.
The skip s mbol indicates that under certain circumstances ou can skip certain steps.
The result s mbol indicates information about the obtained result of a step.
The warning s mbol indicates dangerous situations and actions, which might impair the functionalit of
the product, damage the product or hurt the user.
Introduction
In this manual ou learn how to change the mount of a ZEISSLightweight Zoom LWZ.3 21-100/
T2.9-3.9 T* (abbreviation: ZEISSLWZ.3) and how to match it to a digital camera. In order to
explain the procedure, this manual uses a ZEISSLWZ.3, which is scaled in feet with PL mount.
Proceed in the same sequences to switch from or to an other mount that is available for the
ZEISSLWZ.3 (Canon
1
EF, Nikon
2
F, Son
3
Eand MFT).
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
Son and E-mount are registered trademarks of Son Corporation

1
front lens
2
focus ring
3
lens foot
4
index mark
5
aperture ring
6
zoom ring
7
lens barrel
8
small screw
9
electrical contact
10
rear lens
11
groove of the lens
12
shims
13
mount including the black inner ring
14
T3 screws
15
T6 screws
Overview
Deliver Contents of a ZEISS LWZ.3
21 3 6 7 8 104
5 12 13 14 15119
• 1x ZEISSLWZ.3
• 1x Front cap
• 1x Rear cap
• 1x Focus lever
• 3x Lens support riser 3/8”

Technical Data
ZEISS Lightw eight Zoom LWZ.3
Focal length 21–100 mm
Aperture range 2.9 to 22
Lens elements / Groups 22 lenses / 18 groups
Close focus
1
0.8 m / 2'8"
Rotation angle of focusing ring
(inf – MOD)
294°
Zoom rotation angle 100°
Aperture rotation angle 48°
Front diameter 114 mm / 4.49"
Length
2
226 mm / 8.9"
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
3
61–14°
Normal 35
4
55–12°
APS-C
5
56–13°
MFT
6
45–9°
1
Close focus distance is measured from the image plane
2
Front to PL-mount ı ange
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 Academ 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")

Changing the Mount of a ZEISS LWZ.3
In this chapter ou learn how to change the mount of a ZEISSLWZ.3. The procedure consist of
2 parts which are both mandator to successfull change a mount. You learn how to detach the
currentl attached mount and how to attach a diĴerent mount. To make sure the ZEISSLWZ.3
works properl , additionall complete the subsequent procedure:
Adjusting a ZEISSLWZ.3 to Your Digital Camera.
Detaching a Mount
You need
ZEISSLWZ.3
ZEISST6 torque wrench with a torque of 0.4 Nm
alternativel : regular T6 torque wrench with a torque of 0.4 Nm
ZEISST3 torque wrench with a torque of 0.05 Nm
alternativel : regular T3 torque wrench with a torque of 0.05 Nm
ZEISSInterchangeable Mount Set for ZEISSLWZ.3
The use of tools oĴered b ZEISSis highl recommended. You can purchase these tools directl from ZEISS
or our trusted ZEISSdealer. See Mount Change Accessories
Requirements
Ensure that our working space is ı at 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 ZEISSLWZ.3.
Ensure that the front lens cap sits on our ZEISSLWZ.3, in order to avoid scratches.

1. Place our ZEISSLWZ.3 on a ı at surface with the mount facing up and the serial number facing awa from ou.
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 ou are changing from an 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.

4. With a T6 torque wrench remove the remaining torx screws of the mount.
The black inner ring is securel fastened to the mount at the ZEISSfactor and does not need to be removed.
The mount is now loose.
5. Carefull detach the mount from our ZEISSLWZ.3.
If ou are changing from a PL mount, ou can directl see the shims.
If ou are changing from an other mount than a PL mount, ou can now see the black adapter ring.
If ou are changing from a PL mount, skip Step 6 and 7, since the PL mount doesn´t have an adapter ring.

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 diĴerent mounts.
The black adapter ring is now loose.
7. Detach the black adapter ring from our ZEISSLWZ.3.
Now ou see the shim(s) and a small screw in the groove of the lens barrel.
You successfull detached the mount.
When detaching the mount for the İ rst time, do not remove the shims.
Never remove the small screw in the groove of the lens.
1groove of the lens 2shims 3small screw in the groove of the lens

Attaching a Mount
You need
ZEISSLWZ.3
ZEISST6 torque wrench with a torque of 0.4 Nm
ZEISST3 torque wrench with a torque of 0.05 Nm
ZEISSInterchangeable Mount Set for ZEISSLWZ.3
The use of tools oĴered b ZEISSis highl recommended. You can purchase these tools directl from ZEISS
or our trusted ZEISSDealer. See Mount Change Accessories
Requirements
Ensure that our working space is ı at 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 ZEISSLWZ.3.
Ensure that the front lens cap sits on our ZEISSLWZ.3, in order to avoid scratches.
Make sure ou successfull completed Part 1: Detaching a Mount

If ou are changing to a PL mount, skip Steps 1 and 2 in this chapter.
1. Carefull place the adapter ring, which came with our ZEISSInterchangeable Mount Set for the ZEISSLWZ.3.
Make sure the small screw in the groove of the ZEISSLWZ.3 sinks into groove of the adapter ring and the electrical
contact İ ts into the recess.
The shape and height of the black adapter ring varies according
to the diĴerent mounts.
2. With the T6 torque wrench tighten the torx screws using a torque of 0.4 N

3. Place the mount on our ZEISSLWZ.3:
3.I PL mount: Place the PL mount on the ZEISSLWZ.3 in such a wa that the recess of the mount la s on top of the
electrical contact. The groove on the other side of the PL mount should then also la on top of the small screw on
the lens barrel. Screw in the 2 shorter T3 screws to İ x the electrical contact.
3.II EFmount: Place the silver EFmount on the adapter ring in such a wa that the notch aligns with the index mark.

3.III Fmount: Place the F mount on the adapter ring in such a wa that the notch aligns with the index mark.
3.IV MFT mount: Place the MFT mount on the adapter ring in such a wa that the notch aligns with the index mark.

3.V Emount: Place the Emount on the adapter ring in such a wa 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 successfull changed the mount of a ZEISSLWZ.3.
In this chapter ou learned how to detach the mount of our ZEISSLWZ.3 and attach a new mount to our ZEISS
LWZ.3. To make sure our ZEISSLWZ.3 works properl , also complete the subsequent procedure: Adjusting a ZEISS
LWZ.3 to Your Digital Camera