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Pentax K Lenses for less than $300 that have a focus motor, are 14mm or wider and have a f/4 or faster aperture

#1

Pentax SMC DA 10-17mm f/3.5-4.5 ED

Pentax SMC  DA 10-17mm f/3.5-4.5 ED

"I am very pleased with this lens so far. It is built well and shots are very clear. " bhphotovideo.com

 
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Fisheye
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Extremely wide circular images
 
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Supports autofocus
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Easier to use
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Aperture f/3.5
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Auto focus Yes
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Min focal length 10 mm
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Diameter 69 mm
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Focus motor Generic motor
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Length 71 mm
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Fisheye Yes
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Zoom range 1.7x
#2

Rokinon 14mm f/2.8 IF ED UMC Pentax K

Rokinon 14mm f/2.8 IF ED UMC Pentax K
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Aperture f/2.8
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Auto focus No
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Min focal length 14 mm
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Diameter 87 mm
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Focus motor Generic motor
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Length 95 mm
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Fisheye No
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Zoom range 1x
#3

Rokinon 8mm f/3.5 HD Pentax K

Rokinon 8mm f/3.5 HD Pentax K
 
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Fisheye
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Extremely wide circular images
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Aperture f/3.5
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Auto focus No
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Min focal length 8 mm
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Diameter 75 mm
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Focus motor Generic motor
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Length 77 mm
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Fisheye Yes
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Zoom range 1x
#4

Samyang 14mm f/2.8 IF ED UMC Pentax K

Samyang 14mm f/2.8 IF ED UMC Pentax K
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Aperture f/2.8
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Auto focus No
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Min focal length 14 mm
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Diameter 87 mm
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Focus motor Generic motor
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Length 95 mm
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Fisheye No
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Zoom range 1x