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Lens category
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Pentax Lenses that have a f/4 or faster aperture

#1

Pentax SMC FA 77mm f/1.8

Pentax SMC  FA 77mm f/1.8

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

 
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Wide aperture
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f/1.8
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Aperture f/1.8
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Length 48 mm
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Zoom range 1x
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Diameter 74 mm
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Min focal length 77 mm
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Weight 269 g
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Max focal length 77 mm
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Auto focus Yes
#2

Pentax SMC DA 18-135mm f/3.5-5.6 ED AL DC WR

Pentax SMC  DA 18-135mm f/3.5-5.6 ED AL DC WR
 
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Great zoom range
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7.5x
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Aperture f/3.5
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Length 76 mm
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Zoom range 7.5x
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Diameter 74 mm
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Min focal length 18 mm
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Weight 405 g
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Max focal length 135 mm
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Auto focus Yes
#3

Pentax SMC HD DA 16-85mm f/3.5-5.6 ED DC WR

Pentax SMC HD DA 16-85mm f/3.5-5.6 ED DC WR
 
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Great zoom range
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5.3x
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Aperture f/3.5
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Length 94 mm
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Zoom range 5.3x
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Diameter 78 mm
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Min focal length 16 mm
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Weight 488 g
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Max focal length 85 mm
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Auto focus Yes
#4

Pentax SMC DA* 300mm f/4 ED SDM

Pentax SMC  DA* 300mm f/4 ED SDM

"Incredible! From the very first moment you look through the view-finder, you'll see the difference. It puts other lenses to shame, especially zooms. Razor sharp!" bhphotovideo.com

 
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Great telephoto lens
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300 mm
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Aperture f/4
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Length 183 mm
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Zoom range 1x
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Diameter 84 mm
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Min focal length 300 mm
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Weight 1.1 kg
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Max focal length 300 mm
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Auto focus Yes
#5

Pentax SMC DA 14mm f/2.8

Pentax SMC  DA 14mm f/2.8

"ALL IN ALL THIS LENSE DELIVERS BEAUTIFUL EXPOSURES IF YOU KNOW HOW TO USE YOUR CAMARA!!!" bhphotovideo.com

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Aperture f/2.8
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Length 69 mm
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Zoom range 1x
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Diameter 84 mm
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Min focal length 14 mm
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Weight 420 g
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Max focal length 14 mm
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Auto focus Yes
#6

Pentax SMC HD Pentax-DA 55-300mm f/4-5.8 ED WR

Pentax SMC HD Pentax-DA 55-300mm f/4-5.8 ED WR
 
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Great telephoto lens
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300 mm
 
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Great zoom range
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5.5x
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Aperture f/4
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Length 112 mm
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Zoom range 5.5x
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Diameter 71 mm
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Min focal length 55 mm
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Weight 466 g
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Max focal length 300 mm
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Auto focus Yes
#7

Pentax SMC DA FA 100mm f/2.8 WR Macro

Pentax SMC  DA FA 100mm f/2.8 WR Macro

"It is light weight, very smooth, very sharp images" bhphotovideo.com

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Aperture f/2.8
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Length 64 mm
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Zoom range 1x
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Diameter 81 mm
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Min focal length 100 mm
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Weight 340 g
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Max focal length 100 mm
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Auto focus Yes
#8

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." bhphotovideo.com

 
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f/1.9
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Aperture f/1.9
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Length 28 mm
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Zoom range 1x
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Diameter 64 mm
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Min focal length 43 mm
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Weight 156 g
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Max focal length 43 mm
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Auto focus Yes
#9

Pentax SMC DA 50mm f/1.8

Pentax SMC  DA 50mm f/1.8
 
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Wide aperture
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f/1.8
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Aperture f/1.8
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Length 38 mm
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Zoom range 1x
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Diameter 64 mm
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Min focal length 50 mm
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Weight 122 g
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Max focal length 50 mm
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Auto focus Yes
#10

Pentax SMC HD DA 21mm f/3.2 AL

Pentax SMC HD DA 21mm f/3.2 AL
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Aperture f/3.2
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Length 25 mm
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Zoom range 1x
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Diameter 64 mm
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Min focal length 21 mm
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Weight 119 g
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Max focal length 21 mm
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Auto focus Yes