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Wide angle focal length
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A wide angle view of a city scape

Pentax K Wide angle lenses made by Tamron that have a generic focus motor and are 18mm or wider

#1

Tamron 17-50mm f/2.8 XR Di-II LD [IF] Pentax K

Tamron 17-50mm f/2.8 XR Di-II LD [IF] Pentax K

"It's razor sharp, even wide open. If that's all that matters to you in a lens, stop, do not pass Go! and buy this lens. Bokeh is pleasing for its price range as well." bhphotovideo.com

 
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Fixed aperture
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The same maximum aperture at all focal lengths
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Min focal length 17 mm
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Max focal length 50 mm
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Focus motor Generic motor
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Aperture f/2.8
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Zoom range 2.9x
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Diameter 74 mm
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Fixed aperture Yes
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Length 81 mm
#2

Tamron 18-200mm f/3.5-6.3 XR Di-II Macro Pentax K

Tamron 18-200mm f/3.5-6.3 XR Di-II Macro Pentax K

"The variable zoom is so versatile, it has become the only lens we carry." bhphotovideo.com

 
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Great zoom range
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11.1x
 
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Great telephoto lens
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200 mm
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Min focal length 18 mm
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Max focal length 200 mm
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Focus motor Generic motor
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Aperture f/3.5
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Zoom range 11.1x
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Diameter 74 mm
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Fixed aperture No
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Length 84 mm
#3

Tamron SP 10-24mm f/3.5-4.5 DI II Pentax K

Tamron SP 10-24mm f/3.5-4.5 DI II Pentax K

"Nice to have a lens that will work as a fish eye AND a regular wide angle. I took some fun pictures this weekend and was very pleased with the results." bhphotovideo.com

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Min focal length 10 mm
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Max focal length 24 mm
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Focus motor Generic motor
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Aperture f/3.5
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Zoom range 2.4x
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Diameter 79 mm
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Fixed aperture No
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Length 99 mm