Mounted Iris Diaphragm, 50 mm Dia, Metric

Max/Min Aperture - 50.0/2.0 mm

The Ealing range of Mounted Iris Diaphragms are lever operated and offer a continuous variable diameter aperture in a range of four sizes. Two versions are available, a standard and unmounted iris diaphragms which have a minimum closed aperture. The standard models are supplied in a black anodized aluminum mount which has a laser engraved scale indicating aperture size.

The fixed stud in their base is either M4 or 8-32 (catalog numbers prefixed by 53- have metric M4 studs while 61- denotes an 8-32 inch thread). They can be mounted on a Half-inch Post.