Allied Vision S-2.97-F4-5MP-T1-2.5 User manual

V1.1.0
Allied Vision Technologies GmbH // Taschenweg 2a, 07646 Stadtroda / Germany 2020-Jan-07
ALVIUM CAMERAS
S-Mount Lenses
User Guide

S-Mount lenses at a glance
2S-Mount Lenses User Guide V1.1.0
S-Mount lenses at a glance
Shipping contents
•S-Mountlens
• Fixing nut
What else do you need?
Read this document carefully
Learn to use S-Mount lenses in the most safe and efficient way and avoid damage
to Alvium cameras and lenses.
Technical information and ordering
For all information about Alvium cameras and accessories, see
• for MIPI CSI-2 cameras: www.alliedvision.com/en/support/
technical-documentation/alvium-csi-2-documentation.
• for USB3 Vision cameras:
www.alliedvision.com/en/support/technical-documentation/
alvium-usb-documentation.
• Please contact your Allied Vision Sales representative for ordering and for
additional information on hardware options for Alvium cameras.
• To find contact information, visit our website:
www.alliedvision.com/en/contact.
i

Contact us
3S-Mount Lenses User Guide V1.1.0
Contact us
Website
General
www.alliedvision.com/en/contact
Distribution partners
www.alliedvision.com/en/about-us/where-we-are
Email
General
[email protected]
Support
[e-mail]
Headquarters
Allied Vision Technologies GmbH
Taschenweg 2a
07646 Stadtroda, Germany
T// [phone]
F// [phone]
Sales offices
Europe, Middle East, and Africa
North and South America
Asia-Pacific
China
T// [phone]
Toll-free: +1 877 USA 1394
T// [phone]
California: [phone]
T// [phone]
T// [phone]

Contents
4S-Mount Lenses User Guide V1.1.0
Contents
S-Mount lenses at a glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Shipping contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
What else do you need? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Contact us . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Document history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Conventions used in this user guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Typographical styles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Symbols and notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Lenses naming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Intended use and safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Your safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Product safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Maximum protrusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Fixing nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Copyright and trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
IR types and lens position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
IR-types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
IR cut filter spectral transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Lens position in tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
S-2.97-F4-5MP-T1-2.5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Lens position at infinity (approximately) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
S-4.1-F3-5MP-T1-2.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Lens position at infinity (approximately) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
S-6-F1.8-5MP-T1-2.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Lens position at infinity (approximately) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
S-8-F1.8-5MP-T1-2.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Lens position at infinity (approximately) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
S-12-F2.8-5MP-T1-2.5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Lens position at infinity (approximately) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Using S-Mount lenses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Mounting and focusing S-Mount lenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

S-Mount Lenses User Guide V1.1.0 5
Document history and conventions
This chapter includes:
Document history ................................................................... 6
Conventions used in this user guide....................................... 6

Document history and conventions
6S-Mount Lenses User Guide V1.1.0
Document history
Conventions used in this user guide
To give this manual an easily understood layout and to emphasize important
information, the following typographical styles and symbols are used:
Typographical styles
Symbols and notes
Version Date Remarks
V1.1.0 2020-Jan-07 •AddedIR cut filter spectral transmission on page 12.
• Added convention for Lenses naming on page 7.
• Applied minor editorial changes.
V1.0.0 2019-May-23 Release version
Table 1: Document history
Style Function
Emphasis Highlighting important things
Web links and references Links to webpages and internal cross references
Table 2: Typographical styles
CAUTION
Personal injuries
Precautions are described.
NOTICE
Material damage
Precautions are described.
Additional information
Web link or reference to an external source with more information is shown.
i

Document history and conventions
7S-Mount Lenses User Guide V1.1.0
Lenses naming
S-Mount lenses are named to identify model properties.
For example, S-2.97-F4-5MP-T1-2.5-IRC is composed of:
Correspondingly, S-2.97-F4-5MP-T1-2.5 is composed of:
S2.97 F4 5MP T1-2.5 IRC
Content
element
Lens mount Focal length Aperture
(f/#)
Supported
pixel
resolution
Sensor size IR-type
Content
meaning
S-Mount 2.97 mm F/4 5 MP* Type 1/2.5 IR cut filter
*Megapixels
Table 3: Naming for lenses with an IR cut filter
S2.97 F4 5MP T1-2.5
Content
element
Lens mount Focal length Aperture
(f/#)
Supported
pixel
resolution
Sensor size IR-type
Content
meaning
S-Mount 2.97 mm F/4 5 MP* Type 1/2.5 IP-optimized
*Megapixels
Table 4: Naming for lenses that IR-optimized

S-Mount Lenses User Guide V1.1.0 8
Intended use and safety
This chapter includes:
Intended use ........................................................................... 9
Your safety............................................................................... 9
Product safety ......................................................................... 9
Copyright and trademarks .................................................... 10

Intended use and safety
9S-Mount Lenses User Guide V1.1.0
Intended use
Allied Vision’s objective is the development, design, production, maintenance,
servicing and distribution of digital cameras and components for image processing.
We are offering standard products as well as customized solutions.
Intended use of Allied Vision product is the integration into Vision systems by
professionals. All Allied Vision product is sold in a B2B setting.
Allied Vision isn’t a legal manufacturer of medical product. Instead, Allied Vision
cameras and accessories may be used as components for medical product after
design-in by the medical device manufacturer and based on a quality assurance
agreement (QAA) between Allied Vision (supplier) and medical device
manufacturer (customer). Allied Vision’s duties in that respect are defined by ISO
13485, clause 7.2 (customer-related processes, equivalent to ISO 9001, clause 8.2).
Your safety
Threads of the lens and the camera lens mount have sharp edges. Be careful these
edges do not cut your skin when handling lenses and lens mounts.
Product safety
To prevent material damage, read the following to understand risks in using
S-Mount lenses.
Maximum protrusion
If the lens exceeds maximum protrusion, camera,
lens, or electronics can be damaged. Do the
following to avoid damage:
• Screw in lenses for Alvium cameras to
11.0 mm maximum protrusion.
• Be very careful when you focus S-Mount
lenses. When your object distance requires
focusing towards infinity, the camera sensor
and the back lens can easily be damaged. We
recommend to use a live image to avoid
damage.
• See the Lens position at infinity
(approximately) section for your lens in
Specifications on page 11.
• Follow the instruction in Using S-Mount lenses
on page 18.
Figure 1: Maximum protrusion
Maximum
protrusion
Sensor
Electronics
ĨƌŽŶƚŇĂŶŐĞ
Lens mount

Intended use and safety
10S-Mount Lenses User Guide V1.1.0
Sensor
Fixing nuts
If fixing nuts are screwed with too much force, threads are worn out and lenses
cannot be locked anymore. Using pinch nose pliers, screw fixing nuts only with
enough force to keep the lens in a fixed position.
Copyright and trademarks
All text, pictures, and graphics are protected by copyright and other laws
protecting intellectual property. All content is subject to change without notice.
All trademarks, logos, and brands cited in this document are property and/or
copyright material of their respective owners. Use of these trademarks, logos, and
brands does not imply endorsement.
Copyright © 2020 Allied Vision Technologies GmbH. All rights reserved.
Sensors are sensitive to excessive
radiation: focused sunlight, lasers, and
X-rays can damage the sensor. Dirt and
scratches can damage the sensor, too.
Alvium cameras with S-Mount lenses
are delivered without a filter to
protect the sensor.
Alvium cameras do not need
additional cleaning. Cameras are
cleaned before shipping. Incorrect
cleaning can damage the sensor.
Therefore, never clean the sensor.
Protect the sensor from dirt, because
dirt becomes more visible the closer it
gets to the sensor. In addition, keep
the back lens clean. Hold the camera
with the lens mount facing the ground
to keep dirt out of the lens mount
Figure 2: Protecting the sensor from dirt

S-Mount Lenses User Guide V1.1.0 11
Specifications
This chapter includes:
IR types and lens position..................................................... 12
S-2.97-F4-5MP-T1-2.5........................................................... 13
S-4.1-F3-5MP-T1-2.5 ............................................................. 14
S-6-F1.8-5MP-T1-2.5............................................................. 15
S-8-F1.8-5MP-T1-2.5............................................................. 16
S-12-F2.8-5MP-T1-2.5........................................................... 17

Specifications
12S-Mount Lenses User Guide V1.1.0
IR types and lens position
IR-types
S-Mount lenses in this user guide are offered as IR-optimized and IR cut.
IR cut filter spectral transmission
Lens position in tables
Tables for Lens position at infinity show nominal values.
The nominal value for flange focal distance (optical) is 12.63 mm. In tables for Lens
position at infinity (approximately), the value is rounded to 12.6 mm.
IR-type IR correction effect
IR-optimized Some optical elements have an optical coating for use in the visible and NIR
spectrum.
IR cut An IR cut filter improves color reproduction and focus (visible with monochrome
cameras as well).
Table 5: IR types
Figure 3: IR cut filter spectral transmission
0
10
20
30
40
50
60
70
80
90
100
300 350 400 450 500 550 600 650 700 750 800 850
Transmission[%]
Wavelength [nm]

Specifications
13S-Mount Lenses User Guide V1.1.0
S-2.97-F4-5MP-T1-2.5
Lens position at infinity (approximately)
Table 7 defines values for the position of the lens when focused to infinity. We
recommend using a minimum thread engagement length of 1.0 mm (two 360
degree turns). Below this length, lens mounting is not stable enough.
Feature S-2.97-F4-5MP-T1-2.5 S-2.97-F4-5MP-T1-2.5-IRC
Product code 12338 12339
Camera mount S-Mount (M12 × 0.5)
Sensor size Type 1/2.5
Focal length 2.97 mm
Aperture (f/#) f/4.0
Supported pixel resolution 5 megapixels
Angle of view (diagonal) 102° with Type 1/2.5
Back focus 3.5 mm
IR correction type IR-optimized IR cut
Relative illumination >66%
Distortion <1%
Dimensions (diameter × length) Ø 14 mm × 18.5 mm Ø 14 mm × 18.1 mm
Mass <10 g
Table 6: S-2.97-F4-5MP-T1-2.5 specifications
ID Component or distance type IR-optimized IR cut
1Electronics component -
2Sensor with cover glass -
aLens front to sensor1distance 20.6 mm
bLens front to front flange distance 8.0 mm 8.5 mm
cFlange focal distance (optical) 112.6 mm
dThread engagement length 8.7 mm
eLens back to sensor distance 2.1 mm
fLens thread end to sensor1distance 3.9 mm
1O p t i c a l d i s ta n c e m e a s u r e d t o t h e a c t i v e s e n s o r s u r f a c e ,
disregarding microlenses and cover glass.
Table 7: S-2.97-F4-5MP-T1-2.5 lens position at infinity (with schematic drawing)
a
1
2
cb
de
f
Lens

Specifications
14S-Mount Lenses User Guide V1.1.0
S-4.1-F3-5MP-T1-2.5
Lens position at infinity (approximately)
Table 9 defines values for the position of the lens when focused to infinity. We
recommend using a minimum thread engagement length of 1.0 mm (two 360
degree turns). Below this length, lens mounting is not stable enough.
Feature S-4.1-F3-5MP-T1-2.5 S-4.1-F3-5MP-T1-2.5-IRC
Product code 12340 12341
Camera mount S-Mount (M12 × 0.5)
Sensor size Type 1/2.5
Focal length 4.1 mm
Aperture (f/#) f/3.0
Supported pixel resolution 5 megapixels
Angle of view (diagonal) 82° with Type 1/2.5
Back focus 5.3 mm
IR correction type IR-optimized IR cut
Relative illumination >70%
Distortion <0.4%
Dimensions (diameter × length) Ø 14 mm × 17.9 mm Ø 14 mm × 17.8 mm
Mass <10 g
Table 8: S-4.1-F3-5MP-T1-2.5 specifications
ID Component or distance type IR-optimized IR cut
1Electronics component -
2Sensor with cover glass -
aLens front to sensor1distance 21.8 mm
bLens front to front flange distance 9.2 mm 9.7 mm
cFlange focal distance (optical) 112.6 mm
dThread engagement length 6.9 mm
eLens back to sensor distance 4.1 mm
fLens thread end to sensor1distance 5.7 mm
1Optical distance measured to the active sensor surface,
disregarding microlenses and cover glass.
Table 9: S-4.1-F3-5MP-T1-2.5 lens position at infinity (with schematic drawing)
a
1
2
cb
de
f
Lens

Specifications
15S-Mount Lenses User Guide V1.1.0
S-6-F1.8-5MP-T1-2.5
Lens position at infinity (approximately)
Table 11 defines values for the position of the lens when focused to infinity. We
recommend using a minimum thread engagement length of 1.0 mm (two 360
degree turns). Below this length, lens mounting is not stable enough.
Feature S-6-F1.8-5MP-T1-2.5 S-6-F1.8-5MP-T1-2.5-IRC
Product code 12342 12343
Camera mount S-Mount (M12 × 0.5)
Sensor size Type 1/2.5
Focal length 6 mm
Aperture (f/#) f/1.8
Supported pixel resolution 5 megapixels
Angle of view (diagonal) 61.5° with Type 1/2.5
Back focus 9.6 mm
IR correction type IR-optimized IR cut
Relative illumination >64%
Distortion <-12%
Dimensions (diameter × length) Ø 14 mm × 18.8 mm Ø 14 mm × 18.6 mm
Mass <10 g
Table 10: S-6-F1.8-5MP-T1-2.5 specifications
ID Component or distance type IR-optimized IR cut
1Electronics component -
2Sensor with cover glass -
aLens front to sensor1distance 26.2 mm
bLens front to front flange distance 13.6 mm 13.4 mm
cFlange focal distance (optical) 112.6 mm
dThread engagement length 2.7 mm
eLens back to sensor distance 8.4 mm
fLens thread end to sensor1distance 9.9 mm
1Optical distance measured to the active sensor surface,
disregarding microlenses and cover glass.
Table 11: S-6-F1.8-5MP-T1-2.5 lens position at infinity (with schematic drawing)
a
1
2
cb
de
f
Lens

Specifications
16S-Mount Lenses User Guide V1.1.0
S-8-F1.8-5MP-T1-2.5
Lens position at infinity (approximately)
Table 13 defines values for the position of the lens when focused to infinity. We
recommend using a minimum thread engagement length of 1.0 mm (two 360
degree turns). Below this length, lens mounting is not stable enough.
Feature S-8-F1.8-5MP-T1-2.5 S-8-F1.8-5MP-T1-2.5-IRC
Product code 12344 12345
Camera mount S-Mount (M12 × 0.5)
Sensor size Type 1/2.5
Focal length 8 mm
Aperture (f/#) f/1.8
Supported pixel resolution 5 megapixels
Angle of view (diagonal) 48° with Type 1/2.5
Back focus 7.8 mm
IR correction type (S-8-F1.8-5MP-T1-2.5) IR-optimized IR cut
Relative illumination >68%
Distortion <-7%
Dimensions (diameter × length) Ø 14 mm × 19.5 mm Ø 14 mm × 21.2 mm
Mass <10 g
Table 12: S-8-F1.8-5MP-T1-2.5 specifications
ID Component or distance type IR-optimized IR cut
1Electronics component -
2Sensor with cover glass -
aLens front to sensor1distance 26.2 mm
bLens front to front flange distance 13.6 mm 14.0 mm
cFlange focal distance (optical) 112.6 mm
dThread engagement length 3.9 mm
eLens back to sensor distance 7.1 mm
fLens thread end to sensor1distance 8.7 mm
1Optical distance measured to the active sensor surface,
disregarding microlenses and cover glass.
Table 13: S-8-F1.8-5MP-T1-2.5 lens position at infinity (with schematic drawing)
a
1
2
cb
de
f
Lens

Specifications
17S-Mount Lenses User Guide V1.1.0
S-12-F2.8-5MP-T1-2.5
Lens position at infinity (approximately)
Table 15 defines values for the position of the lens when focused to infinity. We
recommend using a minimum thread engagement length of 1.0 mm (two 360
degree turns). Below this length, lens mounting is not stable enough.
Feature S-12-F2.8-5MP-T1-2.5 S-12-F2.8-5MP-T1-2.5-IRC
Product code 12346 12347
Camera mount S-Mount (M12 × 0.5)
Sensor size Type 1/2.5
Focal length 12 mm
Aperture (f/#) f/2.8
Supported pixel resolution 5 megapixels
Angle of view (diagonal) 33° with Type 1/2.5
Back focus 8.57 mm
IR correction type IR-optimized IR cut
Relative illumination >82.5%
Distortion <-1.75%
Dimensions (diameter × length) Ø 14 mm × 10.2 mm Ø 14 mm × 11.4 mm
Mass <10 g
Table 14: S-12-F2.8-5MP-T1-2.5 specifications
ID Component or distance type IR-optimized IR cut
1Electronics component -
2Sensor with cover glass -
aLens front to sensor1distance 17.5 mm
bLens front to front flange distance 4.9 mm 5.6 mm
cFlange focal distance (optical) 112.6 mm
dThread engagement length 5.0 mm
eLens back to sensor distance 7.6 mm
fLens thread end to sensor1distance 7.6 mm
1Optical distance measured to the active sensor surface,
disregarding microlenses and cover glass.
Table 15: S-12-F2.8-5MP-T1-2.5 lens position at infinity (with schematic drawing)
a
1
2
cb
de
f
Lens

S-Mount Lenses User Guide V1.1.0 18
Using S-Mount lenses
Learn how to use S-Mount lenses.

Using S-Mount lenses
19S-Mount Lenses User Guide V1.1.0
Mounting and focusing S-Mount lenses
This section instructs on using Allied Vision S-Mount lenses with Alvium cameras
safely. Actual fixing nuts may vary from the instruction drawings.
We recommend using pinch nose pliers to tighten fixing nuts.
Figure 4 shows how fixing nuts lock S-Mount lenses.
Follow the instructions to lock the lens in focus position.
Figure 4: Fixing nut locking an S-Mount lens
CAUTION
Cuts to the skin by sharp edges of lens mounts
The threads of the lens mount and the lens itself have sharp edges.
Be careful when mounting or unmounting lenses.
NOTICE
Damage to sensor, optics, or electronics by improper handling
If an S-Mount lens is screwed against the sensor or electronics, sensor, lens, or
electronics can be damaged.
Follow the instructions carefully.
Mounting the fixing nut to the lens
1. Screw the fixing nut clockwise onto the lens until you
can hold the front part (a) of the lens with your finger
tips.
Focusing the lens
Focus by live image. Avoid to screw in the lens deeper
than for infinity focus. For a rough estimation, see
Specifications on page 11.
2. Slowly screw the lens clockwise into the lens mount
until the image is roughly in focus.
3. Slowly screw in and unscrew the lens until you have
found the most accurate focus.
Figure 5: Lens and fixing Nut
Figure 6: Adjusting focus
a

Using S-Mount lenses
20S-Mount Lenses User Guide V1.1.0
NOTICE
Damage to lens threads and fixing nut by excessive force
If the fixing nut is screwed with too much force, threads are worn out and the lens
cannot be locked anymore.
Screw fixing nuts hand tight to keep the lens in a fix position.
Locking focus
Pinch nose pliers are used to screw the fixing nut:
4. Holding the lens in position with one hand, screw the
fixing nut clockwise against the lens mount until you
feel the lens is locked.
Figure 7: Locking the fixing nut
Checking focus is set and locked properly
5. Check No.1:
Try to rotate the lens with little force in both
directions to ensure the lens is safely locked in
position.
Figure 8: Checking lens is safely locked
6. Check No. 2:
The S-Mount thread allows a slightly tilted lens position. In this case, the focus for a common object
plane varies over the image plane.
If the focus is constant over the image plane, you are done.
If the focus varies over the image plane, the lens is tilted. Continue with 7.
7. Loosen the fixing nut.
8. Continue with 3.
The lens is locked in focus and ready for operation.