- Lever Aperture Control
- SM3 (3.035" -40) Internally and Externally Threaded
- Minimum Aperture: Ø2 mm (Ø0.08")
- Maximum Aperture: Ø50 mm (Ø1.97")
Our threaded lever actuated iris diaphragms are continuously variable irises compatible with our Ø3" (Ø75 mm) SM3 threaded lens tubes. Each iris has internal SM threading on one side and external SM 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.
This page contains our SM3 threaded iris; for a full selection of available irises, including irises with the same min / max aperture, please visit our Irises / Apertures navigation menu.