Pentax K Lenses made by Pentax for less than $700 that have a f/2.8 or faster aperture

"Great option for taking casual pictures of family and friends or for low-key urban excursions." bhphotovideo.com

	Aperture	f/2.8			Max focal length	40 mm
	Diameter	64 mm			Zoom range	1x
	Min focal length	40 mm			Weight	91 g
	Length	15 mm			Auto focus	Yes

"The pictures are very sharp. Low light is fantastic. I have not found anything I dislike about it." bhphotovideo.com

Wide aperture f/1.4

	Aperture	f/1.4			Max focal length	50 mm
	Diameter	64 mm			Zoom range	1x
	Min focal length	50 mm			Weight	221 g
	Length	38 mm			Auto focus	Yes

"I bought this in conjunction with the 160fc ringflash, perfect match for this lens.. Aside from being exellent at macro, I found this lens to be stuningly vibrant and contrasty for normal shooting.." bhphotovideo.com

	Aperture	f/2.8			Max focal length	100 mm
	Diameter	81 mm			Zoom range	1x
	Min focal length	100 mm			Weight	340 g
	Length	64 mm			Auto focus	Yes

"This lens produces an accurate reproduction. The f/1.4 aperature has opened-up a whole new range of photo oppurtunities." bhphotovideo.com

Wide aperture f/1.4

	Aperture	f/1.4			Max focal length	55 mm
	Diameter	71 mm			Zoom range	1x
	Min focal length	55 mm			Weight	375 g
	Length	66 mm			Auto focus	Yes

"As expected this is a fast, versatile lens for taking macro photographs." bhphotovideo.com

	Aperture	f/2.8			Max focal length	50 mm
	Diameter	66 mm			Zoom range	1x
	Min focal length	50 mm			Weight	264 g
	Length	66 mm			Auto focus	Yes