Wide aperture
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Lens category
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Lens mount
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Type
A low light shot without a flash

Pentax K Prime Low light lenses that have a f/2.8 or faster aperture

#-1

Pentax SMC 35mm DA L f/2.4 AL

Pentax SMC 35mm DA L f/2.4 AL
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Aperture f/2.4
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Weight 124 g
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Focus motor None
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Max focal length 35 mm
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Length 45 mm
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Diameter 63 mm
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Min focal length 35 mm
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Auto focus Yes
#-2

Pentax SMC FA 50mm f/1.4

Pentax SMC  FA 50mm f/1.4

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

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Aperture f/1.4
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Weight 222 g
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Focus motor None
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Max focal length 50 mm
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Length 38 mm
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Diameter 64 mm
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Min focal length 50 mm
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Auto focus Yes
#-3

Pentax SMC FA 77mm f/1.8

Pentax SMC  FA 77mm f/1.8

"Its color rendition is simply unbelievable. It exceeds even the abilities of my 43 mm Limited for sunsets and sunrises when coupled with the CTE White Balance settings and custom Hi/Lo Key Adjust features on my K-7."

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Aperture f/1.8
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Weight 272 g
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Focus motor None
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Max focal length 77 mm
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Length 64 mm
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Diameter 48 mm
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Min focal length 77 mm
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Auto focus Yes
#-4

Pentax SMC FA 43mm f/1.9

Pentax SMC  FA 43mm f/1.9

"The build quality alone is just so superior; this little beauty is just a joy to handle."

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Aperture f/1.9
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Weight 156 g
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Focus motor None
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Max focal length 43 mm
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Length 28 mm
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Diameter 63 mm
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Min focal length 43 mm
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Auto focus Yes
#-5

Pentax SMC 55mm f/1.4 DA* SDM

Pentax SMC 55mm f/1.4 DA* SDM

"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."

 
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Silent focus motor
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Silent and fast
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Aperture f/1.4
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Weight 375 g
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Focus motor Pentax SDM
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Max focal length 55 mm
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Length n/a
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Diameter n/a
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Min focal length 55 mm
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Auto focus Yes
#-6

Pentax SMC DA 70mm f/2.4

Pentax SMC  DA 70mm f/2.4

"This lens is great for portraits, sharp, nice bokeh and with beatifull color rendition.Autofocus on k-r is really fast and accurate and it feel pretty solid."

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Aperture f/2.4
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Weight 130 g
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Focus motor None
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Max focal length 70 mm
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Length 26 mm
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Diameter 63 mm
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Min focal length 70 mm
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Auto focus Yes
#-7

Pentax SMC 35mm f/2 FA AL

Pentax SMC 35mm f/2 FA AL
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Aperture f/2
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Weight 200 g
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Focus motor None
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Max focal length 35 mm
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Length 46 mm
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Diameter 64 mm
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Min focal length 35 mm
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Auto focus Yes
#-8

Pentax SMC FA 31mm f/1.8

Pentax SMC  FA 31mm f/1.8

"A thing of beauty that takes stunning photos."

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Aperture f/1.8
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Weight 345 g
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Focus motor None
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Max focal length 31 mm
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Length 69 mm
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Diameter 66 mm
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Min focal length 31 mm
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Auto focus Yes
#-9

Sigma 30mm f/1.4 EX DC Pentax-k

Sigma 30mm f/1.4 EX DC Pentax-k

"Awesome lens. In good to decent light, sharp and snappy AF. A 30mm f/1.4 on an crop center hits a pretty decent sweet spot. Relatively sharp (although not across the frame.) Decent MF feel, especially for a modern third party AF lens."

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Aperture f/1.4
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Weight 430 g
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Focus motor None
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Max focal length 30 mm
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Length 59 mm
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Diameter 76 mm
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Min focal length 30 mm
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Auto focus Yes
#-10

Sigma 35mm f/1.4 DG HSM A1 Pentax-k

Sigma 35mm f/1.4 DG HSM A1 Pentax-k
 
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Silent focus motor
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Silent and fast
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Aperture f/1.4
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Weight 0.7 kg
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Focus motor Sigma HSM
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Max focal length 35 mm
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Length n/a
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Diameter n/a
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Min focal length 35 mm
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Auto focus Yes