Wide angle focal length
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Pentax K Lenses that are 18mm or wider

#1

Pentax SMC DA 12-24mm f/4 ED AL

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"This is absolutely the lens I needed to round out my Pentax K10 camera gear." bhphotovideo.com

 
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Fixed aperture
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The same maximum aperture at all focal lengths
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Min focal length 12 mm
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Max focal length 24 mm
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Zoom range 2x
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Auto focus Yes
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Fisheye No
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Aperture f/4
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Fixed aperture Yes
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Diameter 84 mm
#2

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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Min focal length 18 mm
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Max focal length 135 mm
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Zoom range 7.5x
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Auto focus Yes
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Fisheye No
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Aperture f/3.5
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Fixed aperture No
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Diameter 74 mm
#3

Pentax SMC DA 18-55mm f/3.5-5.6 AL WR

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"For landscape photos during the winter months and in wet or dusty conditions, it is a great lens." bhphotovideo.com

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Min focal length 18 mm
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Max focal length 55 mm
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Zoom range 3.1x
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Auto focus Yes
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Fisheye No
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Aperture f/3.5
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Fixed aperture No
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Diameter 69 mm
#4

Pentax SMC DA 10-17mm f/3.5-4.5 ED

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"I just love this lense! Sharp, exact focus on the k10 and superbly build. " bhphotovideo.com

 
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Fisheye
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Extremely wide circular images
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Min focal length 10 mm
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Max focal length 17 mm
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Zoom range 1.7x
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Auto focus Yes
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Fisheye Yes
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Aperture f/3.5
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Fixed aperture No
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Diameter 69 mm
#5

Pentax SMC DAA 18-270mm f/3.5-6.3 ED SDM

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Great zoom range
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15x
 
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Great telephoto lens
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270 mm
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Min focal length 18 mm
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Max focal length 270 mm
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Zoom range 15x
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Auto focus Yes
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Fisheye No
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Aperture f/3.5
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Fixed aperture No
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Diameter 76 mm
#6

Pentax SMC DA* 16-50mm f/2.8 ED SDM

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"Great lens for everyday use... Fast and sharp.... The price was nice also" bhphotovideo.com

 
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Fixed aperture
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The same maximum aperture at all focal lengths
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Min focal length 16 mm
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Max focal length 50 mm
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Zoom range 3.1x
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Auto focus Yes
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Fisheye No
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Aperture f/2.8
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Fixed aperture Yes
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Diameter 84 mm
#7

Sigma 18-300mm f/3.5-6.3 DC MACRO HSM Contemporary Pentax K

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Great zoom range
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16.7x
 
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Great telephoto lens
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300 mm
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Min focal length 18 mm
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Max focal length 300 mm
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Zoom range 16.7x
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Auto focus Yes
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Fisheye No
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Aperture f/3.5
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Fixed aperture No
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Diameter 79 mm
#8

Pentax SMC HD DA 15mm f/4 ED AL

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Min focal length 15 mm
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Max focal length 15 mm
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Zoom range 1x
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Auto focus Yes
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Fisheye No
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Aperture f/4
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Fixed aperture n/a
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Diameter 64 mm
#9

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

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Min focal length 16 mm
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Max focal length 85 mm
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Zoom range 5.3x
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Auto focus Yes
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Fisheye No
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Aperture f/3.5
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Fixed aperture No
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Diameter 78 mm
#10

Rokinon 10mm f/2.8 ED AS NCS CS Pentax K

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Min focal length 10 mm
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Max focal length 10 mm
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Zoom range 1x
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Auto focus No
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Fisheye No
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Aperture f/2.8
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Fixed aperture n/a
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Diameter 86 mm