Lens category
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Lens mount
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Pentax K Lenses

#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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Fixed aperture n/a
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Min focal length 77 mm
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Length 48 mm
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Zoom range 1x
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Max focal length 77 mm
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Weight 269 g
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Aperture f/1.8
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Diameter 74 mm
#2

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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Fixed aperture n/a
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Min focal length 100 mm
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Length 64 mm
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Zoom range 1x
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Max focal length 100 mm
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Weight 340 g
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Aperture f/2.8
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Diameter 81 mm
#3

Pentax SMC FA 43mm f/1.9

Pentax SMC  FA 43mm f/1.9

"So far the results have been great. Nice and sharp. Great bokeh. Excellent lighted build quality." bhphotovideo.com

 
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Quite short
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28 mm
 
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Wide aperture
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f/1.9
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Fixed aperture n/a
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Min focal length 43 mm
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Length 28 mm
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Zoom range 1x
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Max focal length 43 mm
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Weight 156 g
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Aperture f/1.9
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Diameter 64 mm
#4

Pentax SMC DA 40mm f/2.8

Pentax SMC  DA 40mm f/2.8

"Great option for taking casual pictures of family and friends or for low-key urban excursions." bhphotovideo.com

 
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Quite short
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15 mm
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Fixed aperture n/a
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Min focal length 40 mm
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Length 15 mm
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Zoom range 1x
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Max focal length 40 mm
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Weight 91 g
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Aperture f/2.8
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Diameter 64 mm
#5

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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Wide angle lens
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18 mm
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Fixed aperture No
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Min focal length 18 mm
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Length 76 mm
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Zoom range 7.5x
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Max focal length 135 mm
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Weight 405 g
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Aperture f/3.5
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Diameter 74 mm
#6

Pentax SMC HD D FA 150-450mm f/4.5-5.6 DC AW

Pentax SMC HD D FA 150-450mm f/4.5-5.6 DC AW
 
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Great telephoto lens
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450 mm
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Fixed aperture No
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Min focal length 150 mm
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Length 242 mm
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Zoom range 3x
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Max focal length 450 mm
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Weight 2 kg
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Aperture f/4.5
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Diameter 95 mm
#7

Pentax SMC DA 50-200mm f/4-5.6 ED WR

Pentax SMC  DA 50-200mm f/4-5.6 ED WR

"This lens is a great fast focusing, sharp lens. I have been using this lens to take bird photos for the last few weeks and it does a marvelous job. The greatest advantage of this zoom is its size. It breaks down to being only a 1/4 inch longer than my 18-55 zoom kit lens. I also like that is allows manual focus with AF on." bhphotovideo.com

 
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Great zoom range
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4x
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Fixed aperture No
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Min focal length 50 mm
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Length 79 mm
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Zoom range 4x
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Max focal length 200 mm
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Weight 286 g
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Aperture f/4
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Diameter 69 mm
#8

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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Fixed aperture n/a
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Min focal length 300 mm
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Length 183 mm
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Zoom range 1x
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Max focal length 300 mm
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Weight 1.1 kg
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Aperture f/4
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Diameter 84 mm
#9

Pentax SMC HD D FA* 70-200mm f/2.8 ED DC AW

Pentax SMC HD D FA* 70-200mm f/2.8 ED DC AW
 
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Fixed aperture
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The same maximum aperture at all focal lengths
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Fixed aperture Yes
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Min focal length 70 mm
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Length 203 mm
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Zoom range 2.9x
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Max focal length 200 mm
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Weight 1.8 kg
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Aperture f/2.8
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Diameter 92 mm
#10

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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Quite short
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38 mm
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Fixed aperture n/a
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Min focal length 50 mm
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Length 38 mm
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Zoom range 1x
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Max focal length 50 mm
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Weight 122 g
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Aperture f/1.8
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Diameter 64 mm