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Ø1/2" Lens Tubes


  • Directly Accepts Ø1/2" (12.7 mm) Optics
  • Compatible with Our 16 mm Cage Systems
  • Stackable Design is Compatible with SM05-Threaded Components

SM05L30C

Slotted Lens Tube

SM05M10

Lens Tube Without External Threads

SM05L03

Lens Tube with Internal and External Threads

SM05RR

Retaining Ring

SPW603

Spanner Wrench

SM05

SM1

SM2

SM3

Easily Interfaces with Other Lens
Tube Sizes

Related Items


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Post-Mounted Laser Diode
Click to Enlarge

When an engraved lens tube is attached to another lens tube, the engraving of the connected end is no longer visible.

Features

  • Easily Construct Multi-Element Optical Systems
  • Wide Range of SM05-Compatible Optomechanical Components Available
  • Directly Accepts Ø1/2" (Ø12.7 mm) Optics
  • Compatible with Our 16 mm Cage Systems
  • Available With or Without External SM05 Threads
  • Can be Used with Ø5 - Ø9 mm Optics by Purchasing a Small Optic Adapter

Lens tubes are ideal for creating compact optical subassemblies. The Ø1/2" lens tubes sold here can be used to house one or several optical elements, as shown in the diagram of a beam expander below. Optics are separated and secured by retaining rings that are positioned at the desired depth within the lens tube using our SPW603 spanner wrench. Depending on the item purchased, one or two retaining rings are included (see below for details). Additional retaining rings can be purchased separately. In addition to the Ø1/2" lens tubes featured on this page, Thorlabs also offers Ø1", Ø30 mm, Ø2", and Ø3" versions, each of which is equipped with an SM series thread standard that depends on the tube diameter.

Lens Tube Application Example
Lens Tube Compatible Products
Thread Adapters Terminated Fiber Adapters Collimation Package Adapters LED Mounts LD Mounts Aspheric Lens Mounts Irises, Apertures, and Shutters Alignment Tools

Thorlabs' Threading Specifications

Thorlabs' lens tubes utilize a series of non-standard threadings. Threading specifications are given below for our SM threadings utilized in our lens tube and cage system components so that you can machine mating components to suit your application. We also offer products with C-Mount and RMS threadings, and the specifications for these threadings are also given below. Please note that other manufacturers may have different tolerances for these threads. For other thread specifications that are not listed here, please contact Tech Support.

SM05 Threading: Ø1/2" Lens Tubes, 16 mm Cage Systems
External Thread, 0.535"-40.0, UNS-2A Internal Thread, 0.535"-40.0, UNS-2B
Max Major Diameter 0.5340" Min Major Diameter 0.5350"
Min Major Diameter 0.5289" Min Pitch Diameter 0.5188"
Max Pitch Diameter 0.5178" Max Pitch Diameter 0.5230"
Min Pitch Diameter 0.5146" Min Minor Diameter (and 83.3% of thread) 0.508"
Max Minor Diameter 0.5069" Max Minor Diameter (and 64.9% of thread) 0.514"
RMS Threading: Objective, Scan, and Tube Lenses
External Thread, 0.800"-36.0, UNS-2A Internal Thread, 0.800"-36.0, UNS-2B
Max Major Diameter 0.7989" Min Major Diameter 0.8000"
Min Major Diameter 0.7934" Min Pitch Diameter 0.7820"
Max Pitch Diameter 0.7809" Max Pitch Diameter 0.7866"
Min Pitch Diameter 0.7774" Min Minor Diameter (and 83.3% of thread) 0.770"
Max Minor Diameter 0.7688" Max Minor Diameter (and 64.9% of thread) 0.777"
C-Mount Threading: Machine Vision LensesCCD/CMOS Cameras
External Thread, 1.000"-32.0, UN-2A Internal Thread, 1.000"-32.0, UN-2B
Max Major Diameter 0.9989" Min Major Diameter 1.0000"
Min Major Diameter 0.9929" Min Pitch Diameter 0.9797"
Max Pitch Diameter 0.9786" Max Pitch Diameter 0.9846"
Min Pitch Diameter 0.9748" Min Minor Diameter (and 83.3% of thread) 0.966"
Max Minor Diameter 0.9651" Max Minor Diameter (and 64.9% of thread) 0.974"
SM1 Threading: Ø1" Lens Tubes, 30 mm Cage Systems
External Thread, 1.035"-40.0, UNS-2A Internal Thread, 1.035"-40.0, UNS-2B
Max Major Diameter 1.0339" Min Major Diameter 1.0350"
Min Major Diameter 1.0288" Min Pitch Diameter 1.0188"
Max Pitch Diameter 1.0177" Max Pitch Diameter 1.0234"
Min Pitch Diameter 1.0142" Min Minor Diameter (and 83.3% of thread) 1.008"
Max Minor Diameter 1.0068" Max Minor Diameter (and 64.9% of thread) 1.014"
SM30 Threading: Ø30 mm Lens Tubes
External Thread, M30.5x0.5 Internal Thread, M30.5x0.5
Max Major Diameter 30.480 mm Min Major Diameter 30.500 mm
Min Major Diameter 30.371 mm Min Pitch Diameter 30.175 mm
Max Pitch Diameter 30.155 mm Max Pitch Diameter 30.302 mm
Min Pitch Diameter 30.059 mm Min Minor Diameter (and 83.3% of thread) 29.959 mm
Max Minor Diameter 29.938 mm Max Minor Diameter (and 64.9% of thread) 30.094 mm
SM2 Threading: Ø2" Lens Tubes, 60 mm Cage Systems
External Thread, 2.035"-40.0, UNS-2A Internal Thread, 2.035"-40.0, UNS-2B
Max Major Diameter 2.0338" Min Major Diameter 2.0350"
Min Major Diameter 2.0287" Min Pitch Diameter 2.0188"
Max Pitch Diameter 2.0176" Max Pitch Diameter 2.0239"
Min Pitch Diameter 2.0137" Min Minor Diameter (and 83.3% of thread) 2.008"
Max Minor Diameter 2.0067" Max Minor Diameter (and 64.9% of thread) 2.014"
SM3 Threading: Ø3" Lens Tubes
External Thread, 3.035"-40.0, UNS-2A Internal Thread, 3.035"-40.0, UNS-2B
Max Major Diameter 3.0337" Min Major Diameter 3.0350"
Min Major Diameter 3.0286" Min Pitch Diameter 3.0188"
Max Pitch Diameter 3.0175" Max Pitch Diameter 3.0242"
Min Pitch Diameter 3.0133" Min Minor Diameter (and 83.3% of thread) 3.008"
Max Minor Diameter 3.0066" Max Minor Diameter (and 64.9% of thread) 3.014"

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Posted Comments:
Poster:s13d504
Posted Date:2013-05-30 22:34:59.403
Hello,this is Wei Qi,from Kagawa Unv. Japan. We want to buy SM05L05,but we don't know that the lens(Diameter:12.7mm or smaller)can be used in the lens tubes? If the lens(Diameter:12.7mm or smaller)can be used in this lens tubes, the other parts is necessary? You can contact me by e-mail s13d504@stmail.eng.kagawa-u.ac.jp Thank you very much. Regards,
Poster:tcohen
Posted Date:2013-05-30 12:39:00.0
Response from Tim at Thorlabs to Wei: The retention lip is .450” and lenses with a diameter larger than that will be restricted. A 12.7mm lens will pass through the SM05 threads to the retention lip and be held in with a retaining ring (included). Smaller optics can be adapted to the SM05 standard with adapters such as our LMRA series: http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=59.
Poster:jlow
Posted Date:2012-07-31 12:19:00.0
A response from Jeremy at Thorlabs. Thank you for your feedback. I have forwarded your feedback to our engineering group to be added. The inner diameter for the part you referenced is Ø0.450".
Poster:
Posted Date:2012-07-31 09:36:49.0
The dimension of the ID of the externally threaded end is missing from the SM05L05 lens tube drawing. As this diameter defines the maximum aperture of the back end of the lens tube i would consdier it an important number to provide. Please be kind enough to add this dimension.
Poster:jjurado
Posted Date:2011-02-15 08:39:00.0
Response from Javier at Thorlabs to sivan.jonathan: Thank you very much for submitting your request. I will send you the specs for our SM05 threads to your e-mail. We will also post this information on the web shortly.
Poster:sivan.jonathan
Posted Date:2011-02-14 13:36:51.0
Hello, I need to interface with this product, both to external and internal threading. Can I recieve the engineering specs for these threads (they are not standard). Specifically tap, diameters etc...

Ø1/2" Stackable Lens Tubes

  • Stackable Design Enables Multi-Element Optical Systems
  • SM05-Threaded (0.535"-40) Bore Directly Accepts Ø1/2" (12.7 mm) Optics
  • Accommodates Ø5 - Ø9 mm Optics by Purchasing a Small Optic Adapter
  • Directly Compatible with Our 16 mm Cage Assembly Systems

These stackable Ø1/2" lens tubes provide a fast and easy means for building compact optical assemblies. Their stackable design and direct interfacing with any SM05-threaded (0.535"-40) components provide flexibility for complex optomechanical assemblies. One SM05RR Retaining Ring is included with each lens tube.

SM05Lxx Lens Tube Diagram
Item # L1 L2 Thread Depth
SM05L03 0.41" (10.4 mm) 0.08" (2.0 mm) 0.30" (7.6 mm)
SM05L05 0.61" (15.5 mm) 0.50" (12.7 mm)
SM05L10 1.11" (28.2 mm) 1.00" (25.4 mm)
SM05L15 1.61" (40.9 mm) 1.50" (38.1 mm)
SM05L20 2.11" (53.6 mm) 2.00" (50.8 mm)
SM05L30 3.11" (79.0 mm) 3.00" (76.2 mm)
Alternatives Ø1", Ø2", and Ø3" Stackable Lens Tubes Ø1" and Ø2" Lens Tube Extensions
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
SM05L03 Support Documentation
SM05L03SM05 Lens Tube, 0.30" Thread Depth, One Retaining Ring Included
$13.50
Today
SM05L05 Support Documentation
SM05L05SM05 Lens Tube, 0.50" Thread Depth, One Retaining Ring Included
$13.75
Today
SM05L10 Support Documentation
SM05L10SM05 Lens Tube, 1" Thread Depth, One Retaining Ring Included
$14.75
Today
SM05L15 Support Documentation
SM05L15SM05 Lens Tube, 1.5" Thread Depth, One Retaining Ring Included
$16.00
Today
SM05L20 Support Documentation
SM05L20SM05 Lens Tube, 2" Thread Depth, One Retaining Ring Included
$19.75
Today
SM05L30 Support Documentation
SM05L30SM05 Lens Tube, 3" Thread Depth, One Retaining Ring Included
$23.75
Today

Ø1/2" Lens Tubes Without External Threads

  • SM05-Threaded (0.535"-40) Bore Directly Accepts Ø1/2" (12.7 mm) Optics
  • Accommodates Ø5 - Ø9 mm Optics by Purchasing a Small Optic Adapter
  • Unlike Stackable Lens Tubes, Optics can be Accessed from Both Ends
  • Use Lens Tube Couplers to Stack Multiple Lens Tubes
  • Allows Coupling of Two Externally SM05-Threaded Components

Unlike our Ø1/2" stackable lens tubes featured above, these internally threaded lens tubes do not feature a lip at one end nor do they have external SM05 threading. Therefore, optics housed inside can be accessed from both ends. To join these lens tubes end-to-end, use an SM05T2 Lens Tube Coupler. Two SM05RR Retaining Rings are included with each lens tube.

Alternatives Ø1" and Ø2" Lens Tubes Without External Threads
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
SM05M05 Support Documentation
SM05M05Customer Inspired!SM05 Lens Tube Without External Threads, 1/2" Long, Two Retaining Rings Included
$13.50
Today
SM05M10 Support Documentation
SM05M10Customer Inspired!SM05 Lens Tube Without External Threads, 1" Long, Two Retaining Rings Included
$14.75
Today
SM05M15 Support Documentation
SM05M15SM05 Lens Tube Without External Threads, 1.5" Long, Two Retaining Rings Included
$15.50
Today
SM05M20 Support Documentation
SM05M20Customer Inspired!SM05 Lens Tube Without External Threads, 2" Long, Two Retaining Rings Included
$16.50
Today
SM05M30 Support Documentation
SM05M30Customer Inspired!SM05 Lens Tube Without External Threads, 3" Long, Two Retaining Rings Included
$18.00
3-5 Days

Ø1/2" Slotted Lens Tubes

Slotted Lens Tube
Click to Enlarge

The dust cover can be opened or closed by rotating it in either direction.
  • Easy Access to Optics
  • Rotatable Slip Shield Protects Optics
  • Compatible with SM05 (0.535"-40) Threaded Components
  • Available in 2" (50.8 mm) and 3" (76.2 mm) Thread Depths

These stackable Ø1/2" lens tubes with side slots provide a fast and easy means for building complex optical assemblies and adjusting the optics without disassembling the setup. Optics can be inserted into the tube and locked into position using the included SM05RR retaining rings. Simply thread the first retaining ring to the desired depth, add the optic, and then use a second retaining ring to secure the optic. Optics can be manually adjusted via the side slots without the use of a spanner wrench. The rotatable slip shield included with the lens tube has an inner diameter of 0.71" (17.9 mm) and fits over the lens tube slots to prevent unwanted light from entering the system and to keep the optical setup free from debris.

Alternatives Ø1" and Ø2" Slotted Lens Tubes
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
SM05L20C Support Documentation
SM05L20CSM05 Slotted Lens Tube, 2" Thread Depth, 2 Retaining Rings Included
$50.00
Lead Time
SM05L30C Support Documentation
SM05L30CSM05 Slotted Lens Tube, 3" Thread Depth, 2 Retaining Rings Included
$50.00
Today

Ø1/2" Retaining Rings and Spanner Wrenches

Retaining Ring Clear Apertures
Item # Inner Diameter
SM05RR 0.44" (11.0 mm)
SM05LTRR 0.32" (8.1 mm)
SM05PRR 0.44" (11.0 mm)

  • SM05RR Retaining Rings Secure Ø1/2" Optics
  • SM05LTRR Retaining Rings Provide Stress-Free, Light-Tight Mounting of Ø1/2" Components
  • SM05PRR Plastic Retaining Rings Provide Gentler Contact with Optic Surfaces
  • Spanner Wrenches Provide One-Handed Adjustment of SM05RR Retaining Rings
  • SPW801 Adjustable Spanner Wrench can Accommodate Diameters from 0.12" (3.0 mm) to 2.89" (73.4 mm)

Thorlabs offers three different kinds of SM05 (0.535"-40) Retaining Rings. The SM05RR is our Standard Aluminum Retaining Ring that ships with our Ø1/2" lens tubes as well as many other Thorlabs components, and is available individually and in packs of 10.

If desired, the SM05RR can be swapped out for an SM05LTRR, which is a Retaining Ring equipped with a Buna-N O-ring designed to reduce stress on the optical component and to produce a light-tight seal. Another option is the SM05PRR, which is a plastic retaining ring that provides gentler contact with with the surface of optics than our standard Ø1/2" retaining rings. Please keep in mind that due to the increased thicknesses of the SM05LTRR and SM05PRR retaining rings, the maximum optic thickness that can be housed inside our standard SM05-compatible mounts will be diminished in some cases. The clear aperture of the SM05LTRR retaining ring is also slightly diminished in comparison to the standard and plastic SM05 retaining rings.

To position and adjust these retaining rings, choose from two spanner wrench options. The SPW603 Spanner Wrench has a hollow design that enables retaining rings for our SM05 series of lens tubes to be adjusted and installed without obscuring the beam path. The handle is knurled for improved grip. For use with longer lens tubes, multiple SPW603 spanning wrenches can be stacked to extend the wrench's maximum reach. Alternatively, the SPW801 Adjustable Spanner Wrench can also be used to position any SM05 retaining rings. Please note that the SPW801 wrench can withstand a maximum torque of 80 inch pounds. In addition, we offer the SPB05 Spanner Bit, which can be used with a manual driver handle with a standard 1/4" hex socket. The SPB05 is included as part of the SPB600 Spanner Wrench Bit Kit.

Alternatives Ø1", Ø2", and Ø3" Fixed Diameter Spanner Wrenches Ø1", Ø2", and Ø3" Retaining Rings
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
SM05RR Support Documentation
SM05RRSM05 Retaining Ring for Ø1/2" Lens Tubes and Mounts
$4.00
Today
SM05RR-P10 Support Documentation
SM05RR-P10SM05 Retaining Ring for Ø1/2" Lens Tubes and Mounts, 10 Pack
$36.00
Today
SM05LTRR Support Documentation
SM05LTRRSM05 Series Stress-Free Retaining Ring
$18.40
Today
SM05PRR Support Documentation
SM05PRRCustomer Inspired!SM05 Plastic Retaining Ring for Ø1/2" Lens Tubes and Mounts
$5.00
Today
SPW603 Support Documentation
SPW603SM05 Spanner Wrench, Length = 1"
$24.00
Today
SPW801 Support Documentation
SPW801Adjustable Spanner Wrench
$95.90
Today
SPW102 Support Documentation
SPW102Adjustable Spanner Wrench, Replacement Blade Set
$27.90
Today
SPB05 Support Documentation
SPB05SM05 Spanner Bit
$24.00
Today
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