Pentax 645 Mount
27.5mm (35mm Equivalent)
Aperture Range: f/3.5 to f/32
Two Aspherical Elements
High Refractive Low Dispersion Element
HD and Super Protect Lens Coatings
Internal Focusing Mechanism
Rounded 9-Blade Diaphragm
Minimum Focusing Distance: 11.8"
Front Filter Thread: 82mm