Edmund Optics 30-263 Iris Diaphragm Aperture is a precision adjustable iris for controlling light transmission in optical paths. The opening adjusts from Ø0.8 mm to Ø12 mm. The body has Ø19.8 mm outer diameter and is 5 mm thick. The iris diaphragm design yields smooth, repeatable adjustment, helping to contour beam diameter and minimize stray light in imaging, microscopy, and other light‑sensitive experiments.
