SM05-Threaded Irises


SM05-Threaded Irises

  • Lever-Activated and Ring-Activated Versions
  • SM05-Threaded Housing
  • Ø5.0 mm (Ø0.20") Maximum Aperture


  • Internally and Externally SM05 (0.535"-40) Threaded
  • Available in Lever- and Ring-Activated Versions
  • Minimum Aperture: Ø0.7 mm (Ø0.03")
  • Maximum Aperture: Ø5 mm (Ø0.20")

Our SM05-threaded (0.535"-40) irises are continuously variable irises compatible with our SM05 lens tubes. Each iris has internal SM05 threading on one side and external SM05 threading on the other side. The individual black spring steel leaves pivot within the outer ring of the iris and are designed for long-lasting performance over several thousand cycles. They are available in lever-activated or ring-activated versions. The ring-activated iris is ideal for use in a 16 mm cage system, where the cage rods may limit the range of lever adjustment.

Thorlabs offers a complete line of irises and apertures for a variety of applications.


Our Mission is to accelerate the advancement of optical technology for precision measurements and their applications from the table tops of research laboratories to standard use in communication and high technology industries. Our aim is to serve our customers. Our hope is to create a place for highly skilled people in an open environment

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