Lens category
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Lens mount
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Pentax K Lenses

#1

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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Length 203 mm
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Max focal length 200 mm
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Min focal length 70 mm
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Weight 1.8 kg
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Fixed aperture Yes
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Diameter 92 mm
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Aperture f/2.8
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Zoom range 2.9x
#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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Length 76 mm
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Max focal length 135 mm
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Min focal length 18 mm
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Weight 405 g
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Fixed aperture No
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Diameter 74 mm
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Aperture f/3.5
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Zoom range 7.5x
#3

Pentax SMC FA 50mm f/1.4

Pentax SMC  FA 50mm f/1.4

"I love love love this new lens, the quality of the photos is spectacular if done in the right lighting. I would absolutely recommend for novices and professionals alike." bhphotovideo.com

 
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Wide aperture
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f/1.4
 
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Quite short
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38 mm
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Length 38 mm
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Max focal length 50 mm
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Min focal length 50 mm
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Weight 221 g
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Fixed aperture n/a
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Diameter 64 mm
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Aperture f/1.4
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Zoom range 1x
#4

Pentax SMC FA 31mm f/1.8

Pentax SMC  FA 31mm f/1.8

"A thing of beauty that takes stunning photos." bhphotovideo.com

 
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Wide aperture
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f/1.8
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Length 69 mm
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Max focal length 31 mm
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Min focal length 31 mm
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Weight 346 g
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Fixed aperture n/a
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Diameter 66 mm
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Aperture f/1.8
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Zoom range 1x
#5

Pentax SMC DA 560mm f/5.6 ED AW

Pentax SMC DA 560mm f/5.6 ED AW
 
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Great telephoto lens
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560 mm
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Length 522 mm
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Max focal length 560 mm
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Min focal length 560 mm
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Weight 3 kg
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Fixed aperture n/a
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Diameter 130 mm
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Aperture f/5.6
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Zoom range 1x
#6

Pentax SMC 55mm f/1.4 DA* SDM

Pentax SMC 55mm f/1.4 DA* SDM

"This lens produces an accurate reproduction. The f/1.4 aperature has opened-up a whole new range of photo oppurtunities." bhphotovideo.com

 
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Wide aperture
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f/1.4
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Length 66 mm
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Max focal length 55 mm
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Min focal length 55 mm
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Weight 375 g
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Fixed aperture n/a
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Diameter 71 mm
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Aperture f/1.4
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Zoom range 1x
#7

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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Length 48 mm
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Max focal length 77 mm
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Min focal length 77 mm
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Weight 269 g
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Fixed aperture n/a
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Diameter 74 mm
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Aperture f/1.8
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Zoom range 1x
#8

Pentax SMC 35mm DA L f/2.4 AL

Pentax SMC 35mm DA L f/2.4 AL
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Length 46 mm
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Max focal length 35 mm
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Min focal length 35 mm
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Weight 125 g
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Fixed aperture n/a
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Diameter 64 mm
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Aperture f/2.4
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Zoom range 1x
#9

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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Great zoom range
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4.1x
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Length 94 mm
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Max focal length 70 mm
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Min focal length 17 mm
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Weight 485 g
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Fixed aperture Yes
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Diameter 76 mm
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Aperture f/4
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Zoom range 4.1x
#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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Length 38 mm
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Max focal length 50 mm
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Min focal length 50 mm
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Weight 122 g
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Fixed aperture n/a
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Diameter 64 mm
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Aperture f/1.8
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Zoom range 1x