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Optical Component Threading Adapters with CS- and C-Mount (1.00"-32) Threads


  • Integrate C-Mount Threaded Components with Other Industry-Standard Threads
  • Adapters Available with Either Internal or External C-Mount Threads
  • Convert CS-Mount Cameras to C-Mount Standard

CML05

CS- to C-Mount
Adapter

SM1A10TS

Thermally Insulating Adapter
with External SM1 Threads
and Internal C-Mount Threads

RMSA5

External C-Mount
Threads and Internal
RMS Threads

DCC1545M

CML05

MVL4WA

CML05 Adapter Connecting
an MVL4WA C-Mount Lens
to a CS-Mount Camera Body

Related Items


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Interactive Selection Guide

C-Mount Threaded Optical Component Adapters

This page contains all of our Optical Component Thread Adapters that feature CS- or C-Mount (1.00"-32) threading. Adapters featuring either internal or external threads are available.

The CS- and C-Mount standards feature the same 1.00"-32 threads, but C-Mounts have a 5 mm longer flange-to-sensor distance (FSD). We offer the CML05 CS-Mount to C-Mount Extension Adapter, which increases the FSD of a CS-Mount camera by 5 mm to match the FSD of the C-Mount standard. The adapter is internally and externally 1.00"-32 threaded. Our CS- and C-Mount adapters are a subset of our entire line of optical component thread adapters. To view our entire line, please see our Interactive Adapters Selection Guide.

Adapters with External C-Mount (1.00"-32)
and Internal Industry-Standard Threads
Item # Typical Application External Threads Internal Threads
SM05A2
info
 Mount a C-Mount Camera Body to an SM05 Lens Tube C-Mount (1.00"-32) SM05 (0.535"-40)
RMSA5
info
 Mount RMS Objective to Camera C-Mount (1.00"-32) RMS (0.800"-36)
SM1A9
info
 Mount a C-Mount Camera Body to an SM1 Lens Tube C-Mount (1.00"-32) SM1 (1.035"-40)
SM1A9TSa
info
 Mount a C-Mount Camera Body to an SM1 Lens Tube C-Mount (1.00"-32) SM1 (1.035"-40)
TMA5
info
 Mount a C-Mount Camera Body to a T-Mount Lens C-Mount (1.00"-32) T-Mount (M42 x 0.75)
SM2A31
info
 Mount SM2 Lens Tube
to Camera with C-Mount Thread		 C-Mount (1.00"-32) SM2 (2.035"-40)
  • Thermally insulating adapter. See the Thermal Insulation tab above for more information.
Adapters with Internal C-Mount (1.00"-32)
and External Industry-Standard Threads
Item # Typical Application External Threads Internal Threads
RMSA6
info
 Integrate Camera Lens to Microscope C-Mount (1.00"-32) RMS (0.800"-36)
CML05
info
 Mount C-Mount Camera Lens
to CS-Mount Camera		 C-Mount (1.00"-32) CS-Mounta (1.00"-32)
DC-CS1
info
 Mount Camera Lens to
SM1 Lens Tube		 CS-Mounta (1.00"-32) SM1 (1.035"-40)
SM1A10
info
 Mount Camera Lens to
SM1 Lens Tube		 C-Mount (1.00"-32) SM1 (1.035"-40)
SM1A10TSb
info
 Mount Camera Lens to
SM1 Lens Tube		 C-Mount (1.00"-32) SM1 (1.035"-40)
TMA6
info
 Mount Camera Lens to
T-Mount Camera		 C-Mount (1.00"-32) T-Mount (M42 x 0.75)
SM2A54
info
 Mount Camera Lens to
SM2 Lens Tube		 C-Mount (1.00"-32) SM2 (2.035"-40)
  • CS-Mount is the same threading as C-Mount, but the thread depth is 5 mm shorter.
  • Thermally insulating adapter. See the Thermal Insulation tab above for more information.

 

Adapter with External C-Mount (1.00"-32)
and External Industry-Standard Threads
Item # Typical Application External Threads External Threads
SM05A1 info Mount a C-Mount Camera Body to an SM05 Lens Tube C-Mount (1.00"-32) SM05 (0.535"-40)
SM1A39 info Mount a C-Mount Camera Body to an SM1 Lens Tube C-Mount (1.00"-32) SM1 (1.035"-40)
SM2A55
info
 Mount C-Mount Camera Body to an SM2 Lens Tube C-Mount (1.00"-32) SM2 (2.035"-40)
Thermal Stability of Al and Delrin Adapters
Click to Enlarge
Legend
 ReflectanceHeated SM1 Lens Tube with Aluminum Adapter ReflectanceHeated SM1 Lens Tube with Delrin Adapter
 ReflectanceUnheated SM1 Lens Tube with Aluminum Adapter ReflectanceUnheated SM1 Lens Tube with Delrin Adapter

Thermal Insulation Experiment

An experiment was conducted to compare the thermal isolation of our thermally insulating adapters (SM1A4TS, SM1A9TS, SM1A3TS, and SM1A10TS) presented at the bottom of this page with that of our traditional aluminum adapters. During the experiment, an aluminum adapter and a thermally isolating black Delrin® adapter were each used to connect two lens tubes. Then, one of the lens tubes was externally heated to 60 oC using a foil heating element that had been attached to that lens tube’s outer surface.

During the heating process, simultaneous temperature readings were recorded in 30 second intervals for both the heated and unheated lens tube in each system. The measured results are shown in the plot to the right. From the graph, it is clearly evident that there is far less heat transfer when using one of our thermally isolating adapters to connect two lens tubes than exists when using an aluminum adapter.

Selection Guide for Thermally Insulating Adapters
Item #Adapter ProfileExternal ThreadsInternal Threads
SM1A4TS iconRMS (0.800"-36)SM1 (1.035"-40)
SM1A9TS iconC-Mount (1.00"-32)SM1 (1.035"-40)
SM1A3TS iconSM1 (1.035"-40)RMS (0.800"-36)
SM1A10TS iconSM1 (1.035"-40)C-Mount (1.00"-32)

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.


Click to Enlarge
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 Lenses, CCD/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
SM1.5 Threading: Ø1.5" Lens Tubes
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
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"

Posted Comments:
user  (posted 2019-09-12 11:26:28.347)
I suggest that you consider releasing a modified "customer-inspired" version of this part. Increase the OD to 2 inches, smooth or SM2 thread, and you've got yourself a camera with a lens, perfectly mounted and aligned inside a 2" lens tube. A slotted lens tube comes in very handy to turn focusing and iris rings on the lens. (In order to do it now, I had shave off the knurled surface on CML05, then it can go into CP12, then shave off corners of the CP12 so that it can go inside 2" lens tube.)
llamb  (posted 2019-09-12 05:19:41.0)
Thank you for your feedback. We will consider this new product suggestion. Perhaps you can also consider our SM2A54 adapter to achieve a similar function for mounting C-Mounted threaded camera lenses inside an SM2 lens tube. I have reached out to you directly to discuss your application further.
user  (posted 2019-06-17 15:40:15.657)
My application needs 1.042-32 (dia and thread) . I could not find one in your inventory that matches my need. The closest I get is SM05A2 which is 1.000-32. I am wondering if a piece of my spec can me made as a customer inspired product. If so how much may be the unit price. Thanks in advance for your time. Regards Radha K Pattnaik
YLohia  (posted 2019-06-17 04:16:53.0)
Hello Radha, thank you for contacting Thorlabs. Custom items can be requested by emailing your local Thorlabs Technical Support team. I'm reaching out to you directly to discuss the possibility of offering this.
user  (posted 2015-10-20 09:12:42.373)
It would also be nice to have a SM05 to M12 adapter (lenses with an M12 thread seem common for small USB cameras).
besembeson  (posted 2015-10-27 06:42:26.0)
Response from Bweh at Thorlabs USA. Thanks for your feedback. We will review this suggestion for S-mount (M12x0.5) adapters which is relevant for board-level integration of small lenses and small USB cameras like you mentioned.

Adapters with External C-Mount (1.00"-32) and Internal Industry-Standard Threads

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
SM05A2 Support Documentation
SM05A2Adapter with External C-Mount Threads and Internal SM05 Threads
$20.99
5-8 Days
RMSA5 Support Documentation
RMSA5Customer Inspired! Adapter with External C-Mount Threads and Internal RMS Threads
$20.17
Today
SM1A9 Support Documentation
SM1A9Adapter with External C-Mount Threads and Internal SM1 Threads
$19.96
Today
SM1A9TS Support Documentation
SM1A9TSCustomer Inspired! Thermally Insulating Adapter with External C-Mount Threads and Internal SM1 Threads
$23.61
Today
TMA5 Support Documentation
TMA5Customer Inspired! Adapter with External C-Mount Threads and Internal T-Mount Threads
$24.35
5-8 Days
SM2A31 Support Documentation
SM2A31Adapter with External C-Mount Threads and Internal SM2 Threads
$27.59
Today

Adapters with Internal C-Mount (1.00"-32) and External Industry-Standard Threads

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
RMSA6 Support Documentation
RMSA6Customer Inspired! Adapter with External RMS Threads and Internal C-Mount Threads
$20.99
Today
CML05 Support Documentation
CML05CS- to C-Mount Extension Adapter, 1.00"-32 Threaded, 5 mm Length
$18.46
Today
DC-CS1 Support Documentation
DC-CS1Adapter with External SM1 Threads and Internal CS-Mount Threads
$29.49
Today
SM1A10 Support Documentation
SM1A10Adapter with External SM1 Threads and Internal C-Mount Threads
$20.78
Today
SM1A10TS Support Documentation
SM1A10TSCustomer Inspired! Thermally Insulating Adapter with External SM1 Threads and Internal C-Mount Threads
$23.61
5-8 Days
TMA6 Support Documentation
TMA6Customer Inspired! Adapter with Internal C-Mount Threads and External T-Mount Threads
$24.35
Today
SM2A54 Support Documentation
SM2A54Customer Inspired! Adapter with External SM2 Threads and Internal C-Mount Threads
$26.51
Today

Adapters with External C-Mount (1.00"-32) and External Industry-Standard Threads

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
SM05A1 Support Documentation
SM05A1Customer Inspired! Adapter with External C-Mount Threads and External SM05 Threads
$20.99
Today
SM1A39 Support Documentation
SM1A39Customer Inspired! Adapter with External C-Mount Threads and External SM1 Threads
$21.21
Today
SM2A55 Support Documentation
SM2A55Adapter with External C-Mount Threads and External SM2 Threads
$28.95
Today
Additional Optical Component Thread Adapters
  • SM05-Threaded Adapters

  • RMS-Threaded Adapters

  • M25 x 0.75-Threaded Adapters

  • C-Mount-Threaded Adapters

  • SM1-Threaded Adapters

  • M32 x 0.75-Threaded Adapters

  • M52 x 0.75-Threaded Adapters

  • SM3-Threaded Adapters

  • SM2-Threaded Adapters

  • SM1.5-Threaded Adapters

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