A Drop-In Iris is the simple way of changing the beam size of a fixed focus  ellipsoidal reflector spotlight. Just drop in an Iris, adjust the handle to change the beam size from fully open to nearly fully closed...

A Drop-In Iris is the simple way of changing the beam size of a fixed focus  ellipsoidal reflector spotlight. Just drop in an Iris, adjust the handle to change the beam size from fully open to nearly fully closed.

The DMX iris is a simple way of motorising your lighting fixture so it can change beamspreads as an effect in your show.  You could have a gobo that is revealed as you open the iris, or just change the size of a pool of...

An adjustable iris for the Acclaim Axial Zoomspot and Acclaim Zoomspot ranges. The iris has an adjustable mask to reduces the beam diameter and has a 20-leaf construction.