Lensbaby Circular with Fisheye Pentax K

Weight: 328.85 g
Brand: Lensbaby
Description: Mount: Pentax KA/KAF/KAF2/KAF3, lens type: ultra wide-angle fisheye, focal length: fixed, prime lens focal length: 5.80 mm, aperture F at min. focal length: 3.50, aperture F at max. focu
Type: Lens
Length: 69.9 mm
Diameter: 69.9 mm
Focal length: Permanent
Lens type: Ultra wide angle fisheye
Minimum focus distance: 0.25 m
Focal length of prime lens: 58 mm
Bayonet: Pentax KA/KAF/KAF2/KAF3
Aperture F at max. focal length: 3.5
Aperture F at min. focal length: 3.5
Minimum aperture F: 22
Number of aperture blades: 6
Number of element groups: 5
Number of elements: 8