Telephoto focal length
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Focus motor
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Pentax K Lenses that have a Sigma HSM focus motor and have a 100mm or longer focal length

#1

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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Max focal length 300 mm
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Length 102 mm
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Focus motor Sigma HSM
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Weight 0.6 kg
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Zoom range 16.7x
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Min focal length 18 mm
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Image stabilization None
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Aperture f/3.5
#2

Sigma 18-200mm f/3.5-6.3 DC Macro HSM Pentax K

Sigma 18-200mm f/3.5-6.3 DC Macro HSM Pentax K
 
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Quite short
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86 mm
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Max focal length 200 mm
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Length 86 mm
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Focus motor Sigma HSM
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Weight 431 g
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Zoom range 11.1x
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Min focal length 18 mm
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Image stabilization None
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Aperture f/3.5
#3

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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Length 203 mm
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Focus motor Sigma HSM
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Weight 1.8 kg
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Zoom range 3.3x
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Min focal length 120 mm
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Image stabilization Sigma OS
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Aperture f/4.5
#4

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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Great telephoto lens
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500 mm
 
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More advanced image stabilization
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Sigma OS
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Max focal length 500 mm
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Length 252 mm
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Focus motor Sigma HSM
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Weight 1.9 kg
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Zoom range 3.3x
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Min focal length 150 mm
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Image stabilization Sigma OS
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Aperture f/5
#5

Sigma 18-200mm f/3.5-6.3 II DC HSM Pentax K

Sigma 18-200mm f/3.5-6.3 II DC HSM Pentax K
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Max focal length 200 mm
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Length 88 mm
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Focus motor Sigma HSM
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Weight 490 g
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Zoom range 11.1x
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Min focal length 18 mm
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Image stabilization None
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Aperture f/3.5
#6

Sigma 18-250mm f/3.5-6.3 DC Macro HSM Pentax K

Sigma 18-250mm f/3.5-6.3 DC Macro HSM Pentax K
 
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Great zoom range
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13.9x
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Max focal length 250 mm
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Length 89 mm
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Focus motor Sigma HSM
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Weight 472 g
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Zoom range 13.9x
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Min focal length 18 mm
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Image stabilization None
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Aperture f/3.5
#7

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 telephoto lens
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500 mm
 
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More advanced image stabilization
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Sigma OS
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Max focal length 500 mm
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Length 218 mm
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Focus motor Sigma HSM
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Weight 2 kg
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Zoom range 10x
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Min focal length 50 mm
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Image stabilization Sigma OS
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Aperture f/4.5