lens focal lengths: 35 mm, 50 mm, 80 mm
Aperture Type: Multi-Scaled Diaphragm
Multi-Scaled Diaphragm Aperture: 35 mm: f/3.5 - f/22, 50 mm: f/2.8 - f/22, 80 mm: f/4 - f/22
field of view: 35 mm: 63 degrees, 50 mm: 46 degrees, 80 mm: 30 degrees
filter Thread: 52 mm
focusing Mechanism: Helicoid
Closest focusing Distance: 0.25 m (35 mm), 0.4 m (50 mm), 0.8 m (80 mm)
lens Construction: Lens Base: 3 Elements in 3 Groups, Front Lens Group: 4 Elements in 4 Groups for Each Focal Length
lens Coating: Multi-Coated electronic Contacts: No lens Body: Aluminum