Samyang 300mm f/6.3 ED UMC CS Reflex Olympus 4/3

Weight: 320 g
Brand: Samyang
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
Type: Lens
Length: 73.7 mm
Diameter: 64.5 mm
Focal length: Permanent
Lens type: Telephoto lens
Minimum focus distance: 0.9 m
For non-full frame cameras only: Yes
Focal length of prime lens: 300 mm
Bayonet: 4/3
Filter thread diameter: 55 mm
Aperture F at max. focal length: 6.3
Aperture F at min. focal length: 6.3
Number of element groups: 9
Number of low dispersion elements: 1
Number of elements: 9