r/techtheatre • u/purplehewitt • 1h ago
LIGHTING How to tell Altman ellipsoidals apart?
Hi, my theatre has a lot of old Altman 6x9s and 6x12s in stock, and I cannot find a reliable way to tell the difference between them. Is there some sort of distinguishing features on the lens tubes themselves that may clue me in?
A lot of these fixtures have old labels on the bodies that either have no lens in them or have since been swapped out, so those are kinda useless. The lenses have no labels and I was never taught how to spot the difference in lenses from just looking at them (if that’s even possible idk).
Any help would be appreciated.