Relative Aperture: 2.8
Nominal Focal Length: 28 WA
Effective Focal Length: 29.3
Nodal Point Separation: 58.0
Back Focal Distance: 50.4
Accessory Thread: M77 x 0.75
Front Mount Diameter: 85
Rear Mount Diameter: 30
Shutter Diameter: 61
Overall Length: 81.8
Seating Face to Rear Edge of Mount:20.3
Mounting Thread: M32.5 x 0.5
Flange Focal Distance: 69.6
Smallest Aperture: 32
Weight: 525 g
