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
SM05L03V
Lens Tube with Internal and External Threads
Ø1/2" Shortcuts |
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Lens Tube Couplers SM Thread Adapters Lens Tube Mounts End Caps Kinematic Mounts Fixed Lens Mounts Rotational Mounts Translation Mounts |
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 or SPW603L spanner wrenches. 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, Ø1.5", Ø2", and Ø3" versions, each of which is equipped with an SM series thread standard that depends on the tube diameter. Vacuum-compatible versions of our Ø1/2" and Ø1" stackable lens tubes are available from stock; customers can request vacuum-compatible lens tubes at other lengths and diameters by contacting Tech Support.
SM05 Threading: Ø1/2" Lens Tubes, 16 mm Cage Systems | |||
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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 | |||
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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 Lenses, CCD/CMOS Cameras | |||
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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 | |||
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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 | |||
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External Thread, M30.5 x 0.5 – 6H/6g | Internal Thread, M30.5 x 0.5 – 6H/6g | ||
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 |
SM1.5 Threading: Ø1.5" Lens Tubes | |||
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External Thread, 1.535"-40 UNS-2A | Internal Thread, 1.535"-40 UNS-2B | ||
Max Major Diameter | 1.5339" | Min Major Diameter | 1.535" |
Min Major Diameter | 1.5288" | Min Pitch Diameter | 1.5188" |
Max Pitch Diameter | 1.5177" | Max Pitch Diameter | 1.5236" |
Min Pitch Diameter | 1.5140" | Min Minor Diameter (and 83.3% of Thread) | 1.508" |
Max Minor Diameter | 1.5068" | Max Minor Diameter (and 64.9% of Thread) | 1.514" |
SM2 Threading: Ø2" Lens Tubes, 60 mm Cage Systems | |||
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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 | |||
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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" |
SM4 Threading: Ø4" Lens Tubes | |||
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External Thread, 4.035"-40 UNS-2A | Internal Thread, 4.035"-40.0 UNS-2B | ||
Max Major Diameter | 4.0337" | Min Major Diameter | 4.0350" |
Min Major Diameter | 4.0286" | Min Pitch Diameter | 4.0188" |
Max Pitch Diameter | 4.0175" | Max Pitch Diameter | 4.0245" |
Min Pitch Diameter | 4.0131" | Min Minor Diameter (and 83.3% of Thread) | 4.008" |
Max Minor Diameter | 4.0066" | Max Minor Diameter (and 64.9% of Thread) | 4.014" |
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.
Item # | L | Internal Thread Depth |
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SM05L03 | 0.33" (8.4 mm) | 0.30" (7.6 mm) |
SM05L05 | 0.53" (13.5 mm) | 0.50" (12.7 mm) |
SM05L10 | 1.03" (26.2 mm) | 1.00" (25.4 mm) |
SM05L15 | 1.53" (38.9 mm) | 1.50" (38.1 mm) |
SM05L20 | 2.03" (51.6 mm) | 2.00" (50.8 mm) |
SM05L30 | 3.03" (77.0 mm) | 3.00" (76.2 mm) |
Alternatives | Ø1", Ø30 mm, Ø1.5", Ø2", and Ø3" Stackable Lens Tubes | Ø1" and Ø2" Lens Tube Extensions |
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Part Number | Description | Price | Availability |
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SM05L03 | SM05 Lens Tube, 0.30" Thread Depth, One Retaining Ring Included | $14.92 | Today |
SM05L05 | SM05 Lens Tube, 0.50" Thread Depth, One Retaining Ring Included | $15.25 | Today |
SM05L10 | SM05 Lens Tube, 1" Thread Depth, One Retaining Ring Included | $16.33 | Today |
SM05L15 | SM05 Lens Tube, 1.5" Thread Depth, One Retaining Ring Included | $18.09 | Today |
SM05L20 | SM05 Lens Tube, 2" Thread Depth, One Retaining Ring Included | $22.28 | Today |
SM05L30 | SM05 Lens Tube, 3" Thread Depth, One Retaining Ring Included | $28.88 | Today |
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. Made from 6061-T6 aluminum, these lens tubes are vacuum compatible down to 10-6 Torr. One vacuum-compatible SM05-threaded retaining ring is included with each lens tube. Please contact Tech Support for replacements.
These vacuum-compatible lens tubes feature venting channels along the internal threading and at the ends of each tube. These channels allow air trapped between mounted optics an easy means of escape during pumpdown.
Item # | L | Internal Thread Depth |
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SM05L03V | 0.33" (8.4 mm) | 0.30" (7.6 mm) |
SM05L05V | 0.53" (13.5 mm) | 0.50" (12.7 mm) |
SM05L10V | 1.03" (26.2 mm) | 1.00" (25.4 mm) |
Vacuum Specifications | |
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Vacuum Compatibility as Packageda | >10-6 Torr |
Materials | 6061-T6 Aluminum |
Preparation and Packaging | Chemically Cleaned and Double Vacuum-Bagged |
Alternatives | Ø1" Vacuum-Compatible Stackable Lens Tubes |
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Part Number | Description | Price | Availability |
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SM05L03V | Vacuum-Compatible SM05 Lens Tube, 0.30" Thread Depth, One Retaining Ring Included | $38.30 | Today |
SM05L05V | Vacuum-Compatible SM05 Lens Tube, 0.50" Thread Depth, One Retaining Ring Included | $39.03 | Today |
SM05L10V | Vacuum-Compatible SM05 Lens Tube, 1.00" Thread Depth, One Retaining Ring Included | $41.77 | Today |
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 |
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Part Number | Description | Price | Availability |
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SM05M05 | Customer Inspired! SM05 Lens Tube Without External Threads, 1/2" Long, Two Retaining Rings Included | $17.22 | Today |
SM05M10 | Customer Inspired! SM05 Lens Tube Without External Threads, 1" Long, Two Retaining Rings Included | $18.84 | Today |
SM05M15 | SM05 Lens Tube Without External Threads, 1.5" Long, Two Retaining Rings Included | $19.84 | Today |
SM05M20 | Customer Inspired! SM05 Lens Tube Without External Threads, 2" Long, Two Retaining Rings Included | $21.07 | Today |
SM05M25 | SM05 Lens Tube Without External Threads, 2.5" Long, Two Retaining Rings Included | $21.73 | Today |
SM05M30 | Customer Inspired! SM05 Lens Tube Without External Threads, 3" Long, Two Retaining Rings Included | $22.95 | Today |
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 |
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Part Number | Description | Price | Availability |
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SM05L20C | SM05 Slotted Lens Tube, 2" Thread Depth, 2 Retaining Rings Included | $68.54 | 3 weeks |
SM05L30C | SM05 Slotted Lens Tube, 3" Thread Depth, 2 Retaining Rings Included | $68.54 | Today |
Retaining Ring Specs | ||||
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Item # | Material | Feature | Thickness | Inner Diameter |
SM05RR | Black Anodized Aluminum | Standard | 0.07" (1.7 mm) |
0.44" (11.0 mm) |
SM05RRV | Unanodized Aluminum | Vacuum Compatiblea | 0.07" (1.7 mm) |
0.44" (11.0 mm) |
SM05LTRR | Black Anodized Aluminum | Rubber O-Ring for Stress-Free Mounting |
0.15" (3.9 mm) |
0.32" (8.1 mm) |
SM05RRC | Black Anodized Aluminum | 5 mm Thick for High-Curvature Lenses |
0.20" (5.0 mm) |
0.44" (11.0 mm) |
SM05PRR | Plastic | Non-Marring | 0.08" (2.0 mm) |
0.44" (11.0 mm) |
POLARIS-SM05RR | Stainless Steel | Vacuum Compatibleb | 0.07" (1.7 mm) |
0.43" (10.9 mm) |
The SM05RR is our standard anodized 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. We offer six different SM05-threaded (0.535"-40) retaining rings, shown in the table to the right, which have unique features and can replace an SM05RR retaining ring. Please keep in mind that due to the increased thickness of some retaining rings, the maximum optic thickness that can be housed inside our standard SM05-compatible mounts will be diminished in some cases.
Spanner Wrenches
We offer three spanner wrench choices that can be used with these retaining rings. The SPW603 and SPW603L Spanner Wrenches have a hollow design that enables retaining rings for our SM05 series of lens tubes to be adjusted and installed without obscuring the beam path. 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 SM05-threaded retaining rings. Please note that the SPW801 wrench can withstand a maximum torque of 80 inch-pounds. We also offer the SPB05 Spanner Bit, which can be used with a standard 1/4" hex driver (sold separately). The SPB05 is included as part of the SPB600 Spanner Wrench Bit Kit.
Alternatives | Ø1", Ø1.5", Ø2", and Ø3" Fixed Diameter Spanner Wrenches | Ø1", Ø1.5", Ø2", and Ø3" Retaining Rings |
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Part Number | Description | Price | Availability |
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SM05RR | SM05 Retaining Ring for Ø1/2" Lens Tubes and Mounts | $4.33 | Today |
SM05RR-P10 | SM05 Retaining Ring for Ø1/2" Lens Tubes and Mounts, 10 Pack | $38.93 | Today |
SM05RRV | Customer Inspired! Unanodized Aluminum SM05 Retaining Ring for Ø1/2" Lens Tubes and Mounts | $12.01 | Today |
SM05LTRR | SM05 (0.535"-40) Stress-Free Retaining Ring | $21.89 | 3 weeks |
SM05RRC | Extra-Thick SM05 (0.535"-40) Threaded Retaining Ring | $10.92 | Today |
SM05PRR | Customer Inspired! SM05 (0.535"-40) Plastic Retaining Ring for Ø1/2" Lens Tubes and Mounts | $6.06 | Today |
POLARIS-SM05RR | Stainless Steel SM05 (0.535"-40) Threaded Retaining Ring | $9.57 | Today |
SPW603 | Spanner Wrench for SM05-Threaded Retaining Rings, Length = 1.00" | $28.54 | Today |
SPW603L | Customer Inspired! Spanner Wrench for SM05-Threaded Retaining Rings, Graduated Scale with 0.02" (0.5 mm) Increments, Length = 3.88" | $65.87 | Lead Time |
SPW801 | Adjustable Spanner Wrench | $114.14 | Today |
SPW102 | Adjustable Spanner Wrench, Replacement Blade Set | $33.20 | Today |