Source Four: Drop-In Iris

Turn your Source Four into a followspot type fixture with one of these from Lightbulb Rentals!  This drop in iris offers precise, smooth control of the beam size and it’s specially made leaves are tempered and heat resistant.  Make sure to add a handle to your order for easy aiming and to prevent burns on older HPL-based fixtures.
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.