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Lens category
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Pentax Lenses that have a f/1.8 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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Aperture f/1.8
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Max focal length 77 mm
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Diameter 74 mm
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Weight 269 g
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Length 48 mm
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Auto focus Yes
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Min focal length 77 mm
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Zoom range 1x
#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." bhphotovideo.com

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Aperture f/1.4
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Max focal length 50 mm
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Diameter 64 mm
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Weight 221 g
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Length 38 mm
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Auto focus Yes
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Min focal length 50 mm
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Zoom range 1x
#3

Pentax SMC DA 50mm f/1.8

Pentax SMC  DA 50mm f/1.8
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Aperture f/1.8
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Max focal length 50 mm
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Diameter 64 mm
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Weight 122 g
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Length 38 mm
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Auto focus Yes
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Min focal length 50 mm
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Zoom range 1x
#4

Pentax SMC FA 31mm f/1.8

Pentax SMC  FA 31mm f/1.8

"The autofocus is fast and accurate and its size and weight balances out the K7 with or without the battery grip." bhphotovideo.com

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Aperture f/1.8
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Max focal length 31 mm
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Diameter 66 mm
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Weight 346 g
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Length 69 mm
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Auto focus Yes
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Min focal length 31 mm
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Zoom range 1x
#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." bhphotovideo.com

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