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Pentax K-5
Lens category
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Pentax K-5

Pentax K-5 Lenses for less than $400 that are 18mm or wider

#1

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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Supports autofocus
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Easier to use
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Min focal length 18 mm
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Zoom range 7.5x
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Fisheye No
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Aperture f/3.5
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Auto focus Yes
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Max focal length 135 mm
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Fixed aperture No
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Diameter 74 mm
#2

Pentax SMC HD DA 18-50mm f/4-5.6 DC WR RE

Pentax SMC HD DA 18-50mm f/4-5.6 DC WR RE
 
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Supports autofocus
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Easier to use
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Min focal length 18 mm
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Zoom range 2.8x
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Fisheye No
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Aperture f/4
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Auto focus Yes
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Max focal length 50 mm
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Fixed aperture No
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Diameter 71 mm
#3

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

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

"I am very pleased with this lens so far. It is built well and shots are very clear. " bhphotovideo.com

 
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Fisheye
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Extremely wide circular images
 
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Supports autofocus
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Easier to use
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Min focal length 10 mm
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Zoom range 1.7x
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Fisheye Yes
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Aperture f/3.5
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Auto focus Yes
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Max focal length 17 mm
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Fixed aperture No
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Diameter 69 mm
#4

Pentax SMC DA 17-70mm f/4 AL SDM

Pentax SMC  DA 17-70mm f/4 AL SDM

"The lens is well-made, the SDM focusing is fast and quiet (used on a Pentax K20D), images are sharp throughout the zoom range, the bokeh is pleasing, and the lens is weatherproof" bhphotovideo.com

 
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Fixed aperture
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The same maximum aperture at all focal lengths
 
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Supports autofocus
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Easier to use
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Min focal length 17 mm
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Zoom range 4.1x
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Fisheye No
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Aperture f/4
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Auto focus Yes
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Max focal length 70 mm
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Fixed aperture Yes
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Diameter 76 mm
#5

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

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

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

 
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Supports autofocus
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Easier to use
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Min focal length 18 mm
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Zoom range 3.1x
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Fisheye No
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Aperture f/3.5
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Auto focus Yes
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Max focal length 55 mm
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Fixed aperture No
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Diameter 69 mm
#6

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

Rokinon 10mm f/2.8 ED AS NCS CS Pentax K
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Min focal length 10 mm
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Zoom range 1x
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Fisheye No
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Aperture f/2.8
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Auto focus No
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Max focal length 10 mm
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Fixed aperture n/a
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Diameter 86 mm
#7

Rokinon 12mm f/2.8 ED AS IF NCS UMC Pentax K

Rokinon 12mm f/2.8 ED AS IF NCS UMC Pentax K
 
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Fisheye
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Extremely wide circular images
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Min focal length 12 mm
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Zoom range 1x
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Fisheye Yes
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Aperture f/2.8
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Auto focus No
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Max focal length 12 mm
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Fixed aperture n/a
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Diameter 77 mm
#8

Rokinon 14mm f/2.8 IF ED UMC Pentax K

Rokinon 14mm f/2.8 IF ED UMC Pentax K
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Min focal length 14 mm
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Zoom range 1x
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Fisheye No
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Aperture f/2.8
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Auto focus No
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Max focal length 14 mm
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Fixed aperture n/a
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Diameter 87 mm
#9

Rokinon 16mm f/2 ED AS UMC CS Pentax K

Rokinon 16mm f/2 ED AS UMC CS Pentax K
 
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Wide aperture
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f/2
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Min focal length 16 mm
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Zoom range 1x
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Fisheye No
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Aperture f/2
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Auto focus No
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Max focal length 16 mm
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Fixed aperture n/a
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Diameter 83 mm
#10

Rokinon 8mm f/3.5 HD Pentax K

Rokinon 8mm f/3.5 HD Pentax K
 
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Fisheye
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Extremely wide circular images
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Min focal length 8 mm
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Zoom range 1x
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Fisheye Yes
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Aperture f/3.5
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Auto focus No
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Max focal length 8 mm
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Fixed aperture n/a
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Diameter 75 mm