Pentax K Prime Low light lenses that have a f/1.8 or faster aperture

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

Supports autofocus Easier to use

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

"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

Supports autofocus Easier to use

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

"I love the lens in almost all ways. It's sharp, fast focusing, needs very little light in F1.4 and the quick shift to manual focus is really OK to have."

Silent focus motor Silent and fast

Supports autofocus Easier to use

	Aperture	f/1.4			Max focal length	55 mm
	Focus motor	Pentax SDM			Diameter	n/a
	Min focal length	55 mm			Weight	375 g
	Length	n/a			Auto focus	Yes

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

Supports autofocus Easier to use

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

"A thing of beauty that takes stunning photos."

Supports autofocus Easier to use

	Aperture	f/1.8			Max focal length	31 mm
	Focus motor	None			Diameter	66 mm
	Min focal length	31 mm			Weight	345 g
	Length	69 mm			Auto focus	Yes

"Great multi-purpose performing lens, particularly if you want to "travel light" and leave the bag at home."

Supports autofocus Easier to use

	Aperture	f/1.8			Max focal length	77 mm
	Focus motor	None			Diameter	48 mm
	Min focal length	77 mm			Weight	272 g
	Length	64 mm			Auto focus	Yes

"I love it for low light photography, indoors without a flash, and to isolate the subject from the background."

Supports autofocus Easier to use

	Aperture	f/1.8			Max focal length	20 mm
	Focus motor	None			Diameter	89 mm
	Min focal length	20 mm			Weight	0.5 kg
	Length	86 mm			Auto focus	Yes

"This lens is great and does what I needed it for."

Supports autofocus Easier to use

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