Pentax K Prime Lenses for less than $500

"I have been very satisfied: this lens is absolutely great for low light, or portraiture, requiring large apertures. I shoot with a Pentax k-x, non full-frame, and so the focal length is closer to 85 mm, perfect for portraits."

Silent focus motor Silent and fast

Wide aperture f/1.4

	Focus motor	Sigma HSM			Max focal length	50 mm
	Aperture	f/1.4			Weight	0.5 kg
	Length	68 mm			Diameter	85 mm
	Min focal length	50 mm			Auto focus	Yes

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

Wide aperture f/1.4

	Focus motor	None			Max focal length	50 mm
	Aperture	f/1.4			Weight	222 g
	Length	38 mm			Diameter	64 mm
	Min focal length	50 mm			Auto focus	Yes

"This lens is light weight and very compact. It is fast enough for low light applications and is built like a tank."

	Focus motor	None			Max focal length	40 mm
	Aperture	f/2.8			Weight	90 g
	Length	15 mm			Diameter	63 mm
	Min focal length	40 mm			Auto focus	Yes

"It is very fast, great for low light, and very sharp when shot around f5.6."

	Focus motor	None			Max focal length	24 mm
	Aperture	f/1.8			Weight	485 g
	Length	79 mm			Diameter	84 mm
	Min focal length	24 mm			Auto focus	Yes

"I have had lots of good experiences with this lens. Versitile lens that does well in most lighting conditions."

Wide aperture f/1.4

	Focus motor	None			Max focal length	30 mm
	Aperture	f/1.4			Weight	430 g
	Length	59 mm			Diameter	76 mm
	Min focal length	30 mm			Auto focus	Yes

"Very fast – and impressive sharpness even with large aperture settings. Excellent bokeh, minimal chromatic aberrations, beautiful colors, very pleasing images."

	Focus motor	None			Max focal length	105 mm
	Aperture	f/2.8			Weight	450 g
	Length	95 mm			Diameter	74 mm
	Min focal length	105 mm			Auto focus	Yes

"I use this lens constantly and have nothing but praise for the quality and uses for this lens. I can capture the macro shot I want and also the group of 15 kids posing at drama school"

	Focus motor	None			Max focal length	50 mm
	Aperture	f/2.8			Weight	315 g
	Length	64 mm			Diameter	71 mm
	Min focal length	50 mm			Auto focus	Yes

"This Tamron macro is a classic and has performance to back it up. It is sharp wide open and sharpness does not drop until f/16. Relative to the Pentax 100 f/3.5 macro, this Tamron is a tank."

	Focus motor	None			Max focal length	90 mm
	Aperture	f/2.8			Weight	405 g
	Length	97 mm			Diameter	71 mm
	Min focal length	90 mm			Auto focus	Yes