Material: Teak Wood Weight: 250 gm
Pinhole Size: 0.18mm Zone Plate (Optional): 25mm with 9 zones
Focal Length: 1" (25mm) Tripod socket: 1/4" Thread
Angle of View: 130 deg. diagonally
Dimension: 5 1/4" (L) x 1 3/4" (D) x 3 1/4"(H) including all knobs
Film Stop: F/138 for pinhole, F/47.6 for zone plate
Film Format: 120 Roll film in 6 x 6 format (not compatible with some China brand)