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Ø2" Rotating Adjustable-Length Lens Tube


  • Rotating or Non-Rotating Adjustment
  • Mounts Ø1" or Ø2" Optics
  • 1.16" (29 mm) or 0.81" (20.7 mm) Travel Range
  • SM2 (2.035"-40) Lens Tube Compatible

SM2NR1

SM2V10

SM2V10 threaded into an
SM2L20 lens tube and mounted onto a
post using an SM2RC lens tube slip ring

Related Items

Features

Item #TravelOptic AccommodatedRotates
SM2NR11.16" (29 mm)Ø1"No
SM2V100.81" (20.7 mm)Ø2"Yes
  • Precise Positioning of Optics within SM2 Lens Tube Systems
  • Up to 1.16" (29 mm) of Travel Along the Optical Axis
  • Internally and Externally SM2 (2.035" -40) Threaded
  • Rotating and Non-Rotating Designs Available

Adjustable length lens tubes allow for the adjustment of an optic's position along the optical axis within a lens tube system. The SM2NR1 provides 1.16" (29 mm) of non-rotating adjustment at 17 mm per revolution for a Ø1" optic; it can be mounted between two fixed lens tubes. The SM2V10 is designed to house a Ø2" optic; the rotating design offers 0.81" (20.7 mm) of travel.

AlternativesØ1/2", Ø1", and Ø3" Adjustable Length Lens TubesØ1" Non-Rotating Adjustable Focus Lens Tube

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 Number Product Description
SM1RR Support Documentation SM1RR : SM1 Retaining Ring for Ø1" Lens Tubes and Mounts
SM1RR Support Documentation SM1RR : SM1 Retaining Ring for Ø1" Lens Tubes and Mounts
SM2NR1 Support Documentation SM2NR1 : Ø2" SM2 Non-Rotating Zoom Housing for Ø1" Optics, 1.56" Travel
Part Number Product Description
SM2RR Support Documentation SM2RR : SM2 Retaining Ring for Ø2" Lens Tubes and Mounts
SM2RR Support Documentation SM2RR : SM2 Retaining Ring for Ø2" Lens Tubes and Mounts
SM2V10 Support Documentation SM2V10 : Ø2" Rotating Adjustable Focusing Element, 0.81" Travel

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Non-Rotating Adjustable Lens Tube

SM2NR1
Click to Enlarge
SM2NR1 can be mounted between two fixed lens tubes.
  • Precise Positioning of Optics within Lens Tube Systems without Rotation
  • 1.16" (29 mm) of Non-Rotating Adjustment at 17 mm Per Revolution
  • Mounts Ø1" Optics with Included SM1RR Retaining Ring
  • Mounts Between Two Fixed SM2 Lens Tubes

Thorlabs' SM2NR1 provides 1.16" (29 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 internal SM1 Threaded 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.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
SM1RR Support Documentation
SM1RR SM1 Retaining Ring for Ø1" Lens Tubes and Mounts
$4.50
Today
SM2NR1 Support Documentation
SM2NR1 Ø2" SM2 Non-Rotating Zoom Housing for Ø1" Optics, 1.56" Travel
$204.00
Today

Rotating Adjustable Length Lens Tube

SM2V10
Click to Enlarge
Simplified Mechanical Drawing of SM2V10
  • Precise Positioning of Optics within Lens Tube Systems
  • 0.81" of Rotating Adjustment Along the Optical Axis
  • Internally and Externally SM2 Threaded
  • Mounts Ø2" Optics with included SM2RR Retaining Ring

This SM2-threaded (2.035"-40) adjustable-length lens tube provides 0.81" of adjustment for Ø2" optics in a lens tube system. Optics are mounted using an included SM2RR retaining ring, and the adjustable-length lens tube is threaded into a compatible lens tube or mount to adjust the position of the optic. The included SM2NT locking nut can be used to fix the position of the optic.

Although a lens tube can be attached to the front of the adjustable-length lens tubes, it should only be done after the position of the optic has been fixed since this lens tube will need to be free to rotate and translate if the position of the optic is changed.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
SM2RR Support Documentation
SM2RR SM2 Retaining Ring for Ø2" Lens Tubes and Mounts
$6.75
Today
SM2V10 Support Documentation
SM2V10 Ø2" Rotating Adjustable Focusing Element, 0.81" Travel
$47.00
Today
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