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

#1

Pentax SMC DA 40mm f/2.8

Pentax SMC  DA 40mm f/2.8

"Great option for taking casual pictures of family and friends or for low-key urban excursions." bhphotovideo.com

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Aperture f/2.8
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Zoom range 1x
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Focus motor Generic motor
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Max focal length 40 mm
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Fisheye No
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Diameter 64 mm
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Auto focus Yes
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Length 15 mm
#2

Pentax SMC DA 50mm f/1.8

Pentax SMC  DA 50mm f/1.8
 
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Wide aperture
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f/1.8
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Aperture f/1.8
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Zoom range 1x
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Focus motor Generic motor
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Max focal length 50 mm
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Fisheye No
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Diameter 64 mm
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Auto focus Yes
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Length 38 mm
#3

Pentax SMC 35mm DA L f/2.4 AL

Pentax SMC 35mm DA L f/2.4 AL
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Aperture f/2.4
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Zoom range 1x
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Focus motor Generic motor
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Max focal length 35 mm
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Fisheye No
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Diameter 64 mm
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Auto focus Yes
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Length 46 mm
#4

Pentax SMC HD DA 18-50mm f/4-5.6 DC WR RE

Pentax SMC HD DA 18-50mm f/4-5.6 DC WR RE
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Aperture f/4
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Zoom range 2.8x
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Focus motor Generic motor
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Max focal length 50 mm
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Fisheye No
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Diameter 71 mm
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Auto focus Yes
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Length 41 mm
#5

Pentax SMC 35mm f/2 FA AL

Pentax SMC 35mm f/2 FA AL
 
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Wide aperture
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f/2
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Aperture f/2
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Zoom range 1x
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Focus motor Generic motor
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Max focal length 35 mm
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Fisheye No
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Diameter 64 mm
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Auto focus Yes
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Length 46 mm
#6

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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Aperture f/3.5
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Zoom range 1.7x
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Focus motor Generic motor
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Max focal length 17 mm
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Fisheye Yes
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Diameter 69 mm
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Auto focus Yes
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Length 71 mm
#7

Pentax SMC DA 18-55mm f/3.5-5.6 AL WR

Pentax SMC DA 18-55mm f/3.5-5.6 AL WR

"For landscape photos during the winter months and in wet or dusty conditions, it is a great lens." bhphotovideo.com

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Aperture f/3.5
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Zoom range 3.1x
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Focus motor Generic motor
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Max focal length 55 mm
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Fisheye No
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Diameter 69 mm
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Auto focus Yes
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Length 69 mm
#8

Pentax SMC DA 50-200mm f/4-5.6 ED WR

Pentax SMC  DA 50-200mm f/4-5.6 ED WR

"This lens is a great fast focusing, sharp lens. I have been using this lens to take bird photos for the last few weeks and it does a marvelous job. The greatest advantage of this zoom is its size. It breaks down to being only a 1/4 inch longer than my 18-55 zoom kit lens. I also like that is allows manual focus with AF on." bhphotovideo.com

 
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Great telephoto lens
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200 mm
 
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Great zoom range
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4x
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Aperture f/4
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Zoom range 4x
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Focus motor Generic motor
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Max focal length 200 mm
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Fisheye No
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Diameter 69 mm
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Auto focus Yes
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Length 79 mm
#9

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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Zoom range 1x
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Focus motor Generic motor
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Max focal length 14 mm
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Fisheye No
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Diameter 87 mm
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Auto focus No
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Length 95 mm
#10

Rokinon 16mm f/2 ED AS UMC CS Pentax K

Rokinon 16mm f/2 ED AS UMC CS Pentax K
 
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Wide aperture
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f/2
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Aperture f/2
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Zoom range 1x
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Focus motor Generic motor
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Max focal length 16 mm
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Fisheye No
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Diameter 83 mm
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Auto focus No
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Length 88 mm