Covers Full Frame and VistaVision formats Constant T3.0 Aperture, 0.8 Module Geared Focus, Aperture, and Zoom Rings for use with Follow Focus Units or Handheld Smooth Stepless Aperture Ring, Metal Barrel Aspherical elements and Super-Low Dispersion glass reduce distortion and increase optical performance 112mm Filter Threads for Tokina Cinema IRND and Clear Filters