Wide angle focal length

Wide aperture

Lens category

Lens mount

Pentax K Lenses that are 10mm or wider and have a f/2.8 or faster aperture

#1	Rokinon 10mm f/2.8 ED AS NCS CS Pentax K

Rokinon 10mm f/2.8 ED AS NCS CS Pentax K

	Min focal length	10 mm			Diameter	86 mm

	Aperture	f/2.8			Length	78 mm

	Fisheye	No			Weight	0.6 kg

	Auto focus	No			Max focal length	10 mm

#2	Samyang 10mm f/2.8 ED AS NCS CS Pentax K

Samyang 10mm f/2.8 ED AS NCS CS Pentax K

	Min focal length	10 mm			Diameter	86 mm

	Aperture	f/2.8			Length	105 mm

	Fisheye	No			Weight	0.6 kg

	Auto focus	No			Max focal length	10 mm

#3	Sigma 10mm f/2.8 EX DC HSM Pentax K

Sigma 10mm f/2.8 EX DC HSM Pentax K

	Fisheye
	Extremely wide circular images

	Supports autofocus
	Easier to use

	Min focal length	10 mm			Diameter	76 mm

	Aperture	f/2.8			Length	84 mm

	Fisheye	Yes			Weight	476 g

	Auto focus	Yes			Max focal length	10 mm

See 16 sample photos taken with the Sigma 10mm f/2.8 EX DC HSM Pentax K

#4	Sigma 4.5mm f/2.8 EX DC HSM Pentax K

Sigma 4.5mm f/2.8 EX DC HSM Pentax K

	Fisheye
	Extremely wide circular images

	Supports autofocus
	Easier to use

	Min focal length	4.5 mm			Diameter	76 mm

	Aperture	f/2.8			Length	79 mm

	Fisheye	Yes			Weight	470 g

	Auto focus	Yes			Max focal length	4.5 mm

See 50 sample photos taken with the Sigma 4.5mm f/2.8 EX DC HSM Pentax K

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