Pentax K-7 Lenses made by Pentax that are 18mm or wider

"I am very pleased with this lens so far. It is built well and shots are very clear. " bhphotovideo.com

Fisheye Extremely wide circular images

	Min focal length	10 mm			Max focal length	17 mm
	Zoom range	1.7x			Aperture	f/3.5
	Fisheye	Yes			Diameter	69 mm
	Fixed aperture	No			Length	71 mm

"After 1 year use, this lens is must-take for me now." bhphotovideo.com

Fixed aperture The same maximum aperture at all focal lengths

	Min focal length	12 mm			Max focal length	24 mm
	Zoom range	2x			Aperture	f/4
	Fisheye	No			Diameter	84 mm
	Fixed aperture	Yes			Length	86 mm

"Great construction, versatile and great image quality, especially the diaphragm closing a little more than 16mm focal length." bhphotovideo.com

Fixed aperture The same maximum aperture at all focal lengths

	Min focal length	16 mm			Max focal length	50 mm
	Zoom range	3.1x			Aperture	f/2.8
	Fisheye	No			Diameter	84 mm
	Fixed aperture	Yes			Length	99 mm

"The lens is well-made, the SDM focusing is fast and quiet (used on a Pentax K20D), images are sharp throughout the zoom range, the bokeh is pleasing, and the lens is weatherproof" bhphotovideo.com

Fixed aperture The same maximum aperture at all focal lengths

	Min focal length	17 mm			Max focal length	70 mm
	Zoom range	4.1x			Aperture	f/4
	Fisheye	No			Diameter	76 mm
	Fixed aperture	Yes			Length	94 mm

"For landscape photos during the winter months and in wet or dusty conditions, it is a great lens." bhphotovideo.com

	Min focal length	18 mm			Max focal length	55 mm
	Zoom range	3.1x			Aperture	f/3.5
	Fisheye	No			Diameter	69 mm
	Fixed aperture	No			Length	69 mm