Sigma AF 30mm f/2.8 DN Art Micro 4/3

Brand: Sigma
Description: Mount: Mamiya 645, lens type: standard, focal length: variable, min. focal length: 55 mm, max. focal length: 110 mm, aperture F at min. focal length: 4.50, aperture F at max. focal length
Additional Information: For mirrorless cameras with interchangeable lenses
Type: Lens
Functions: Focusing motor for Nikon F, internal focusing
Length: 40.5 mm
Diameter: 60.8 mm
Focal length: Permanent
Lens type: Standard
Minimum focus distance: 0.3 m
Auto focus: There is
Focal length of prime lens: 30 mm
Bayonet: Micro 4/3
Filter thread diameter: 46 mm
Aperture F at max. focal length: 2.8
Aperture F at min. focal length: 2.8
Minimum aperture F: 22
Number of aperture blades: 7
Number of aspherical elements: 2
Number of element groups: 5
Number of elements: 7