| | Pentax K Lenses made by Rokinon for less than $300 that have a focus motor and have a f/4 or faster aperture | | |  | | | Aperture | f/2.8 | | | Length | 95 mm | | | | | | | Focus motor | Generic motor | | | Weight | 0.5 kg | | | | | | | Fisheye | No | | | Min focal length | 14 mm | | | | | | | Diameter | 87 mm | | | Max focal length | 14 mm | | | | | | | | | | |  | | | Aperture | f/2 | | | Length | 88 mm | | | | | | | Focus motor | Generic motor | | | Weight | 0.6 kg | | | | | | | Fisheye | No | | | Min focal length | 16 mm | | | | | | | Diameter | 83 mm | | | Max focal length | 16 mm | | | | | | | |  | | | Fisheye | | | Extremely wide circular images | | | | Aperture | f/3.5 | | | Length | 77 mm | | | | | | | Focus motor | Generic motor | | | Weight | 428 g | | | | | | | Fisheye | Yes | | | Min focal length | 8 mm | | | | | | | Diameter | 75 mm | | | Max focal length | 8 mm | | | | | | | | | | | |
