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30 mm Lens Tubes


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30 mm Lens Tubes

Additional Lens Tube Sizes
Ø1/2"
Ø1"
Ø2"
Ø3"
Cross Section of SM-Series Lens Tube

Features

  • Easily Construct Multi-Element Optical Systems
  • Mount Several Optics within the Same Tube Using Multiple Retaining Rings
  • Adapters Provide Direct Compatibility with Our Ø1" or Ø2" Lens Tubes
  • Directly Accepts Ø30 mm Optics

Lens tubes are ideal for creating compact optical subassemblies. The Ø30 mm lens tubes sold here can be used to house one or several optical elements. Optics are separated and secured by retaining rings that are positioned at the desired depth within the lens tube using a spanner wrench. These stackable lens tubes ship with one retaining ring. Additional retaining rings can be purchased separately. In addition to the Ø30 mm lens tubes featured on this page, Thorlabs also offers Ø1/2", Ø1", Ø30 mm, Ø2", and Ø3" versions, each of which is equipped with an SM series thread standard that depends on the tube diameter.

Adapters are also available on this page; these can be used to switch from the Ø30 mm standard to either our Ø1" or Ø2" standard. Via a two-step process, it is also possible to switch to our Ø1/2" or Ø3" standards.

Thorlabs' lens tubes utilize a series of non-standard threadings. If you wish to machine your own mating components, threading specifications for our lens tube and cage system components can be found on the Threading Specs tab.

Lens Tube Application Example
Lens Tube Compatible Products
Thread AdaptersTerminated Fiber AdaptersCollimation Package AdaptersLED and LD MountsAspheric Lens MountsIrises, Apertures, and ShuttersAlignment Tools

SM Series 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. For threading specifications other than what is listed here, please contact Tech Support.

SM05 Threading: Ø1/2" Lens Tubes, 16 mm Cage Systems
External Thread, 0.535"-40.0, UNS-2AInternal Thread, 0.535"-40.0, UNS-2B
Max Major Diameter0.5340"Min Major Diameter0.5350"
Min Major Diameter0.5289"Min Pitch Diameter0.5188"
Max Pitch Diameter0.5178"Max Pitch Diameter0.5230"
Min Pitch Diameter0.5146"Min Minor Diameter (and 83.3% of thread)0.508"
Max Minor Diameter0.5069"Max Minor Diameter (and 64.9% of thread)0.514"
SM1 Threading: Ø1" Lens Tubes, 30 mm Cage Systems
External Thread, 1.035"-40.0, UNS-2AInternal Thread, 1.035"-40.0, UNS-2B
Max Major Diameter1.0339"Min Major Diameter1.0350"
Min Major Diameter1.0288"Min Pitch Diameter1.0188"
Max Pitch Diameter1.0177"Max Pitch Diameter1.0234"
Min Pitch Diameter1.0142"Min Minor Diameter (and 83.3% of thread)1.008"
Max Minor Diameter1.0068"Max Minor Diameter (and 64.9% of thread)1.014"
SM30 Threading: Ø30 mm Lens Tubes
External Thread, M30.5x0.5Internal Thread, M30.5x0.5
Max Major Diameter30.480 mmMin Major Diameter30.500 mm
Min Major Diameter30.371 mmMin Pitch Diameter30.175 mm
Max Pitch Diameter30.155 mmMax Pitch Diameter30.302 mm
Min Pitch Diameter30.059 mmMin Minor Diameter (and 83.3% of thread)29.959 mm
Max Minor Diameter29.938 mmMax 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-2AInternal Thread, 2.035"-40.0, UNS-2B
Max Major Diameter2.0338"Min Major Diameter2.0350"
Min Major Diameter2.0287"Min Pitch Diameter2.0188"
Max Pitch Diameter2.0176"Max Pitch Diameter2.0239"
Min Pitch Diameter2.0137"Min Minor Diameter (and 83.3% of thread)2.008"
Max Minor Diameter2.0067"Max Minor Diameter (and 64.9% of thread)2.014"
SM3 Threading: Ø3" Lens Tubes
External Thread, 3.035"-40.0, UNS-2AInternal Thread, 3.035"-40.0, UNS-2B
Max Major Diameter3.0337"Min Major Diameter3.0350"
Min Major Diameter3.0286"Min Pitch Diameter3.0188"
Max Pitch Diameter3.0175"Max Pitch Diameter3.0242"
Min Pitch Diameter3.0133"Min Minor Diameter (and 83.3% of thread)3.008"
Max Minor Diameter3.0066"Max Minor Diameter (and 64.9% of thread)3.014"
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Posted Comments:
Poster: cbrideau
Posted Date: 2014-01-28 15:30:51.143
I need to adapt an M25x0.75 microscope objective to an M32x0.75 threaded port, and have the objective lowered down a bit. I was wondering if I could get an M32 to SM30 adapter so that I could screw an SM30 tube (L=1") into the M32 port, then get an SM30 to M25 adapter to attach the objective to the tube? Then I could crank the objective (which has an outer diameter of exactly 30mm) in and out of the SM30 tube to adjust my height. I'd be willing to pay the custom machining costs to have this done for quantity 1 for an adapter with M32 ext to SM30 int threads, and a second adapter for SM30 ext to M25 int.
Poster: jlow
Posted Date: 2014-01-29 10:34:00.0
Response from Jeremy at Thorlabs: I will contact you regarding a quote.
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30 mm Lens Tube   amy   lens holder   lens mount   Lens Tube   optical construction   SM30 Lens Tube  
Ø30 mm Lens Tubes
  • Stackable Design Enables Construction of Multi-Element Optical Systems
  • SM30-Threaded (M30.5-0.5) Bore Directly Accepts Ø30 mm Optics
  • Compatible with All SM30-Threaded Components

These stackable Ø30 mm lens tubes provide a fast and easy means for building compact optical assemblies. Their stackable design and direct interfacing with any SM30-threaded (M30.5-0.5) components provide flexibility for complex optomechanical assemblies. One SM30RR retaining ring is included with each lens tube.

SM30Lxx Lens Tube Diagram
Item #L1L2Thread Depth
SM30L05 0.65" 0.12" 0.5"
SM30L10 1.15" 0.12" 1.0"
SM30L30 3.15" 0.12" 3.0"
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
SM30L05 Support Documentation
SM30L05 Customer Inspired! SM30 Lens Tube, 1/2" Thread Depth, One Retaining Ring Included
$26.00
Today
SM30L10 Support Documentation
SM30L10 Customer Inspired! SM30 Lens Tube, 1" Thread Depth, One Retaining Ring Included
$28.00
Today
SM30L30 Support Documentation
SM30L30 Customer Inspired! SM30 Lens Tube, 3" Thread Depth, One Retaining Ring Included
$36.00
Today
SM30RR Support Documentation
SM30RR SM30 Retaining Ring for Ø30 mm Lens Mounts
$11.00
Today
SM30 Adapters
Item # Typical Application Adapter
Profile
External Threads Internal Threads
SM1A15
info
Step Up/Down Lens Tube Size icon SM30 (M30.5 x 0.5) SM1 (1.035"-40)
SM2A12
info
Step Up/Down Lens Tube Size icon SM30 (M30.5 x 0.5) SM2 (2.035"-40)
SM1A16
info
Step Up/Down Lens Tube Size icon SM1 (1.035"-40) SM30 (M30.5 x 0.5)
SM2A11
info
Step Up/Down Lens Tube Size icon SM2 (2.035"-40) SM30 (M30.5 x 0.5)
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
SM1A15 Support Documentation
SM1A15 Customer Inspired! Adapter with External SM30 Threads and Internal SM1 Threads
$21.00
Today
SM2A12 Support Documentation
SM2A12 Customer Inspired! Adapter with External SM30 Threads and Internal SM2 Threads
$28.00
Today
SM1A16 Support Documentation
SM1A16 Customer Inspired! Adapter with External SM1 Threads and Internal SM30 Threads
$21.00
Today
SM2A11 Support Documentation
SM2A11 Customer Inspired! Adapter with External SM2 Threads and Internal SM30 Threads
$22.00
Today
Retaining Rings/Spanner Wrenches

SM30RR: Retaining Rings
These retaining rings can be used to secure optics inside an SM30 Lens tube. One retaining ring is included in the lens tube; however, additional rings enable multiple optics to be secured inside the same lens tube.

SPW801: Adjustable Spanner Wrench

  • Ranges from Ø0.12" (Ø3 mm) to Ø3.0" (Ø75 mm)
  • One-Handed Operation Adjusts Spanning Range
  • Replaceable Blades

The innovative design of the SPW801 Adjustable Spanner Wrench provides one-handed adjustment of the wrench blades, allowing for dynamic fine tuning of the blade separation to match spacing requirements exactly. The reversible blades contain an edge-offset fine point on one end and a flat blade on the opposing end (SPW102 replacement blades are available). This wrench is ideally suited for inserting the retaining rings into our Ø1/2", Ø1", Ø30 mm, Ø2", and Ø3" lens tubes. Please note that the SPW801 wrench can withstand a maximum torque of 80 inch pounds.

SPW607: Hollow Spanner Wrench
The SPW607 Spanner Wrench is hollow enabling retaining rings for our SM30 lens tubes to be adjusted and installed without obscuring the beam path. The knurled grip on one end and the guide flanges on the other ensure safe adjustment of retaining rings without the risk of damage to optical elements.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
SM30RR Support Documentation
SM30RR SM30 Retaining Ring for Ø30 mm Lens Mounts
$11.00
Today
SPW607 Support Documentation
SPW607 Customer Inspired! SM30 Spanner Wrench, Length = 4.35"
$40.00
Today
SPW801 Support Documentation
SPW801 Adjustable Spanner Wrench
$95.90
Today
SPW102 Support Documentation
SPW102 Replacement Blade Set
$27.90
Today
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