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Focus motor
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Pentax Lenses that have a generic focus motor and have a f/4 or faster aperture

#1

Pentax SMC HD DA 21mm f/3.2 AL

Pentax SMC HD DA 21mm f/3.2 AL
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Aperture f/3.2
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Max focal length 21 mm
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Focus motor Generic motor
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Length 25 mm
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Fixed aperture n/a
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Diameter 64 mm
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Zoom range 1x
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Min focal length 21 mm
#2

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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Max focal length 40 mm
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Focus motor Generic motor
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Length 15 mm
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Fixed aperture n/a
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Diameter 64 mm
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Zoom range 1x
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Min focal length 40 mm
#3

Pentax SMC FA 77mm f/1.8

Pentax SMC  FA 77mm f/1.8

"Its color rendition is simply unbelievable. It exceeds even the abilities of my 43 mm Limited for sunsets and sunrises when coupled with the CTE White Balance settings and custom Hi/Lo Key Adjust features on my K-7." bhphotovideo.com

 
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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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Max focal length 77 mm
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Focus motor Generic motor
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Length 48 mm
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Fixed aperture n/a
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Diameter 74 mm
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Zoom range 1x
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Min focal length 77 mm
#4

Pentax SMC HD Pentax-DA 55-300mm f/4-5.8 ED WR

Pentax SMC HD Pentax-DA 55-300mm f/4-5.8 ED WR
 
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Great telephoto lens
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300 mm
 
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Great zoom range
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5.5x
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Aperture f/4
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Max focal length 300 mm
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Focus motor Generic motor
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Length 112 mm
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Fixed aperture No
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Diameter 71 mm
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Zoom range 5.5x
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Min focal length 55 mm
#5

Pentax SMC DA 18-135mm f/3.5-5.6 ED AL DC WR

Pentax SMC  DA 18-135mm f/3.5-5.6 ED AL DC WR
 
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Great zoom range
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7.5x
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Aperture f/3.5
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Max focal length 135 mm
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Focus motor Generic motor
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Length 76 mm
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Fixed aperture No
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Diameter 74 mm
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Zoom range 7.5x
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Min focal length 18 mm
#6

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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Max focal length 50 mm
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Focus motor Generic motor
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Length 38 mm
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Fixed aperture n/a
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Diameter 64 mm
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Zoom range 1x
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Min focal length 50 mm
#7

Pentax SMC FA 31mm f/1.8

Pentax SMC  FA 31mm f/1.8

"The autofocus is fast and accurate and its size and weight balances out the K7 with or without the battery grip." bhphotovideo.com

 
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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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Max focal length 31 mm
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Focus motor Generic motor
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Length 69 mm
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Fixed aperture n/a
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Diameter 66 mm
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Zoom range 1x
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Min focal length 31 mm
#8

Pentax SMC HD DA 70mm f/2.4

Pentax SMC HD DA 70mm f/2.4
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Aperture f/2.4
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Max focal length 70 mm
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Focus motor Generic motor
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Length 25 mm
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Fixed aperture n/a
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Diameter 64 mm
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Zoom range 1x
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Min focal length 70 mm
#9

Pentax SMC 06 15-45mm f/2.8

Pentax SMC 06 15-45mm f/2.8
 
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Fixed aperture
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The same maximum aperture at all focal lengths
 
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Small diameter
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50 mm
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Aperture f/2.8
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Max focal length 45 mm
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Focus motor Generic motor
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Length 56 mm
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Fixed aperture Yes
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Diameter 50 mm
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Zoom range 3x
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Min focal length 15 mm
#10

Pentax SMC FA 50mm f/1.4

Pentax SMC  FA 50mm f/1.4

"I love love love this new lens, the quality of the photos is spectacular if done in the right lighting. I would absolutely recommend for novices and professionals alike." bhphotovideo.com

 
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Wide aperture
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f/1.4
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Aperture f/1.4
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Max focal length 50 mm
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Focus motor Generic motor
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Length 38 mm
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Fixed aperture n/a
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Diameter 64 mm
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Zoom range 1x
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Min focal length 50 mm