Wide aperture
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Lens category
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Focus motor
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A wide angle view of a city scape

Wide angle lenses that have a Pentax SDM focus motor and have a f/4 or faster aperture

#1

Pentax SMC DAA 18-270mm f/3.5-6.3 ED SDM

Pentax SMC  DAA 18-270mm f/3.5-6.3 ED SDM
 
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Great zoom range
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15x
 
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Great telephoto lens
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270 mm
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Aperture f/3.5
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Max focal length 270 mm
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Focus motor Pentax SDM
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Diameter 76 mm
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Zoom range 15x
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Length 89 mm
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Fixed aperture No
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Weight 453 g
#2

Pentax SMC DA* 16-50mm f/2.8 ED SDM

Pentax SMC  DA* 16-50mm f/2.8 ED SDM

"Great lens for everyday use... Fast and sharp.... The price was nice also" bhphotovideo.com

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Aperture f/2.8
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Max focal length 50 mm
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Focus motor Pentax SDM
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Diameter 84 mm
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Zoom range 3.1x
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Length 99 mm
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Fixed aperture Yes
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Weight 0.6 kg
#3

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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Aperture f/4
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Max focal length 70 mm
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Focus motor Pentax SDM
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Diameter 76 mm
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Zoom range 4.1x
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Length 94 mm
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Fixed aperture Yes
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Weight 485 g