35mm focal length; 12-blade internal aperture, controlled by dial on the front of the optic
Aperture range from f/2.5 through f/22
Selective focus optic (creates a sweet spot of focus surrounded by gradual blur)
4 optically coated glass elements, in three groups
Compatible with Composer, Scout, Muse, Control Freak lens bodies (Note: not compatible with the Composer with Tilt Transformer for Micro 4/3rds and Sony NEX cameras)