Iris Diaphragm with Adjustable Aperture, 3" Outer, 30mm Max Manufacturer_Austerlitz and mechanical-advantage experiments (stand base

and mechanical-advantage experiments (stand base and support clamp sold separately)

Open back reveals spine and posterior musculature while the head section preserves upper-body context

leaving inertia to drop the ball straight into the waiting receptacle below

exposing the longitudinal and transverse components of wave motion mechanically

Iris Diaphragm with Adjustable Aperture, 3" Outer, 30mm Max Manufacturer_Austerlitz and mechanical-advantage experiments (stand baseAdjustable iris from closed to a 30mm maximum aperture inside a 3 inch black metal body, with a 2. 5 inch mounting rod giving 5 inches total length for standard optical bench setups.