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Ø2" Adjustable Lens Tubes


  • Rotating Adjustment of Ø2" Optics
  • Non-Rotating Adjustment of Ø1" Optics
  • Internal and External SM2 (2.035"-40) Threads

SM2NR1

SM2V15

SM2V10 Adjustable Lens Tube Connected to a Ø2" Lens Tube and Post-Mounted Using an SM2RC Slip Ring

SM2V05

Related Items

Features

  • Adjustable Positioning of Optics Along the Optical Axis within SM2 Lens Tube Systems
  • Internally and Externally SM2 (2.035" -40) Threaded
  • Rotating and Non-Rotating Optic Designs Available

Adjustable lens tubes allow for the adjustment of an optic's position along the optical axis within a lens tube system. Our adjustable lens tubes are designed to house a Ø2" optic and offer up to 1.31" (33.3 mm) of rotating optic travel. The SM2NR1 Zoom Housing provides 1.56" (39.5 mm) of non-rotating adjustment at 17 mm per revolution for a Ø1" optic; it can be mounted between two fixed lens tubes.

Alternatives Ø1/2", Ø1", and Ø3" Adjustable Lens Tubes Ø1" Non-Rotating Adjustable Focus Lens Tubes

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"
Click the Support Documentation icon document icon or Part Number below to view the available support documentation
Part NumberProduct Description
SM1RR Support Documentation SM1RR:SM1 Retaining Ring for Ø1" Lens Tubes and Mounts
SM2NR1 Support Documentation SM2NR1:Ø2" Non-Rotating Zoom Housing for Ø1" Optics, 1.56" Travel
SM2RR Support Documentation SM2RR:SM2 Retaining Ring for Ø2" Lens Tubes and Mounts
Part NumberProduct Description
SM2V05 Support Documentation SM2V05:Ø2" Adjustable Lens Tube, 0.31" Travel
SM2V10 Support Documentation SM2V10:Ø2" Adjustable Lens Tube, 0.81" Travel
SM2V15 Support Documentation SM2V15:Ø2" Adjustable Lens Tube, 1.31" Travel

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Ø2" Lens Tubes with Rotating Optic Adjustment


Simplified Mechanical Drawing
  • Three Adjustment Ranges
    • SM2V05: 0.31" (7.9 mm)
    • SM2V10: 0.81" (20.6 mm)
    • SM2V15: 1.31" (33.3 mm)
  • Long Externally Threaded Section for Adjustable Positioning of Mounted Optics
  • Maximum Optic Thickness of 0.4" (10 mm) using Included SM2RR Retaining Ring

These SM2-threaded (2.035"-40) adjustable lens tubes have an extra-long externally threaded section, allowing Ø2" optics to be positioned along the optical axis of a Ø2" lens tube system. To operate, mount the optic in the internally threaded section using the included SM2RR retaining ring. Then thread the adjustable lens tube into a compatible (i.e., matching threads) lens tube or SM2-threaded lens mount until the optic is at the desired position. Use the included SM2NT locking ring to fix the position of the lens tube.

These adjustable lens tubes are an ideal solution for fine tuning of the first and last lenses in a lens tube system. Although a lens tube can be attached to the front of the adjustable lens tube, it should only be done after the position has been fixed, since this lens tube will need to be free to rotate and translate if the position is changed. Like our standard lens tubes, these adjustable lens tubes are made of black anodized aluminum.

Item #External Thread Length (L)Maximum Adjustment Rangea
SM2V05 0.5" (12.7 mm) 0.31" (7.9 mm)
SM2V10 1.0" (25.4 mm) 0.81" (20.6 mm)
SM2V15 1.5" (38.1 mm) 1.31" (33.3 mm)
  • Including one SM2NT locking ring and 0.08" (2 mm) minimum thread depth for the attached lens tube or component.
Alternatives Ø1/2", Ø1", and Ø3" Adjustable 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
SM2V05 Support Documentation
SM2V05NEW!Ø2" Adjustable Lens Tube, 0.31" Travel
$45.00
Today
SM2V10 Support Documentation
SM2V10Ø2" Adjustable Lens Tube, 0.81" Travel
$48.40
Today
SM2V15 Support Documentation
SM2V15NEW!Ø2" Adjustable Lens Tube, 1.31" Travel
$50.00
Today

Non-Rotating Zoom Housing for Ø1" Optics

  • Adjustable Positioning of Ø1" Optics within SM2 Lens Tube Systems Without Rotation
  • 1.56" (39.5 mm) of Non-Rotating Adjustment at 17 mm Per Revolution
  • Mounts Ø1" Optics with Included SM1RR Retaining Ring
  • Internal and External SM2 (2.035"-40) Threads
  • Mounts Between Two Fixed SM2 Lens Tubes

Thorlabs' SM2NR1 provides 1.56" (39.5 mm) of non-rotating adjustment for Ø1" optics in a lens tube system. The SM2NR1 is SM2-threaded (2.035"-40) and can be mounted between two fixed lens tubes. It contains an internally SM1-threaded (1.035"-40) cell where optics are installed using the included SM1RR retaining ring. A double helical mechanism moves the optic back and forth while restricting any rotational movement.

SM2NR1
Click to Enlarge

The SM2NR1 zoom housing can be mounted between two fixed SM2 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
SM2NR1 Support Documentation
SM2NR1Ø2" Non-Rotating Zoom Housing for Ø1" Optics, 1.56" Travel
$210.00
Today
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