Aluminum Focus/Iris Marking Ring

These are aluminum focus/iris rings for the Preston Single Channel Handunit. If you’ve ever had a problem with the white plastic Delrin rings being near-impossible to put on or remove from the handset when it’s cold out, it’s because Delrin has a higher coefficient of thermal expansion than aluminum—it shrinks in the cold more than the handset knob.

These aluminum rings will always go on and off with the same consistent friction, whether it’s freezing or sweltering outside, so long as rings and handset are at the same temperature. No more struggling with frozen fingers to force a ring on, or half-mounted rings…

Rings come in eight colours: silver, space grey, red, blue, yellow, green, purple, and black. Perfect for colour coding – primes vs zooms, spherical vs anamorphic, uncoated, special flares, A/B/C cam, etc. Can be directly written on with permanent marker (except the black ring) and wipes clean with alcohol. If you prefer striping with P-touch or white tape, the rims remain visible for colour coding.

Silver, Space Grey, Red, Blue, Yellow, Green, Purple, Black - in stock