Focal length: 135mm
Maximum aperture: 1.8
Minimum aperture: 22
Number of Blades: 9 blades
Filter Diameter: 77mm
Lens construction: 11 elements in 8 groups
Magnification: x0.25
Minimum Focus Distance : 2' 5" (72cm)
Dimensions (D x L): 3.1/2" x 4.5/8" (88.5 x 115mm)
Weight: 2lbs 3oz (985g)

Bayonet