Telephoto focal length
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Lens category
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Lens mount
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Pentax K Lenses that have a 300mm or longer focal length

#1

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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Max focal length 560 mm
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Image stabilization None
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Min focal length 560 mm
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Weight 3 kg
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Zoom range 1x
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Diameter 130 mm
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Length 522 mm
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Aperture f/5.6
#2

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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Max focal length 300 mm
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Image stabilization None
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Min focal length 300 mm
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Weight 1.1 kg
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Zoom range 1x
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Diameter 84 mm
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Length 183 mm
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Aperture f/4
#3

Pentax SMC HD Pentax-DA 55-300mm f/4-5.8 ED WR

Pentax SMC HD Pentax-DA 55-300mm f/4-5.8 ED WR
 
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Wide angle lens
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55 mm
 
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Quite short
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112 mm
 
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Very light
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466 g
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Max focal length 300 mm
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Image stabilization None
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Min focal length 55 mm
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Weight 466 g
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Zoom range 5.5x
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Diameter 71 mm
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Length 112 mm
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Aperture f/4
#4

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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Max focal length 450 mm
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Image stabilization None
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Min focal length 150 mm
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Weight 2 kg
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Zoom range 3x
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Diameter 95 mm
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Length 242 mm
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Aperture f/4.5
#5

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

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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Wide angle lens
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18 mm
 
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Quite short
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102 mm
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Max focal length 300 mm
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Image stabilization None
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Min focal length 18 mm
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Weight 0.6 kg
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Zoom range 16.7x
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Diameter 79 mm
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Length 102 mm
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Aperture f/3.5
#6

Sigma 120-400mm f/4.5-5.6 DG APO OS HSM Pentax K

Sigma 120-400mm f/4.5-5.6 DG APO OS HSM Pentax K
 
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More advanced image stabilization
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Sigma OS
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Max focal length 400 mm
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Image stabilization Sigma OS
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Min focal length 120 mm
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Weight 1.8 kg
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Zoom range 3.3x
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Diameter 91 mm
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Length 203 mm
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Aperture f/4.5
#7

Sigma 150-500mm f/5-6.3 DG OS HSM APO Pentax K

Sigma 150-500mm f/5-6.3 DG OS HSM APO Pentax K
 
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More advanced image stabilization
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Sigma OS
 
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Great telephoto lens
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500 mm
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Max focal length 500 mm
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Image stabilization Sigma OS
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Min focal length 150 mm
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Weight 1.9 kg
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Zoom range 3.3x
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Diameter 94 mm
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Length 252 mm
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Aperture f/5
#8

Sigma 300mm f/2.8 EX DG Pentax K

Sigma 300mm f/2.8 EX DG Pentax K

"It is fast in auto focus and I didn't miss a shot when trying to photograph snow geese!" bhphotovideo.com

 
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Wide aperture
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f/2.8
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Max focal length 300 mm
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Image stabilization None
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Min focal length 300 mm
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Weight 2.4 kg
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Zoom range 1x
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Diameter 119 mm
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Length 213 mm
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Aperture f/2.8
#9

Sigma 50-500mm f/4.5-6.3 APO DG OS HSM Pentax K

Sigma 50-500mm f/4.5-6.3 APO DG OS HSM Pentax K
 
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Great zoom range
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10x
 
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More advanced image stabilization
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Sigma OS
 
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Wide angle lens
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50 mm
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Max focal length 500 mm
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Image stabilization Sigma OS
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Min focal length 50 mm
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Weight 2 kg
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Zoom range 10x
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Diameter 104 mm
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Length 218 mm
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Aperture f/4.5
#10

Sigma 500mm f/4.5 EX DG APO Pentax K

Sigma 500mm f/4.5 EX DG APO Pentax K
 
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Great telephoto lens
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500 mm
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Max focal length 500 mm
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Image stabilization None
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Min focal length 500 mm
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Weight 3.1 kg
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Zoom range 1x
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Diameter 122 mm
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Length 351 mm
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Aperture f/4.5