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Lens mount
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Type

Pentax K Zoom Lenses

#1

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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Fisheye No
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Aperture f/3.5
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Fixed aperture No
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Length 69 mm
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Max focal length 55 mm
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Diameter 69 mm
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Zoom range 3.1x
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Min focal length 18 mm
#2

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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Fisheye No
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Aperture f/4
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Fixed aperture No
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Length 112 mm
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Max focal length 300 mm
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Diameter 71 mm
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Zoom range 5.5x
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Min focal length 55 mm
#3

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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Fisheye No
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Aperture f/3.5
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Fixed aperture No
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Length 76 mm
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Max focal length 135 mm
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Diameter 74 mm
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Zoom range 7.5x
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Min focal length 18 mm
#4

Pentax SMC HD DA 16-85mm f/3.5-5.6 ED DC WR

Pentax SMC HD DA 16-85mm f/3.5-5.6 ED DC WR
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Fisheye No
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Aperture f/3.5
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Fixed aperture No
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Length 94 mm
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Max focal length 85 mm
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Diameter 78 mm
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Zoom range 5.3x
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Min focal length 16 mm
#5

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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Quite short
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41 mm
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Fisheye No
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Aperture f/4
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Fixed aperture No
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Length 41 mm
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Max focal length 50 mm
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Diameter 71 mm
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Zoom range 2.8x
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Min focal length 18 mm
#6

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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Fisheye No
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Aperture f/4
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Fixed aperture No
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Length 79 mm
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Max focal length 200 mm
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Diameter 69 mm
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Zoom range 4x
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Min focal length 50 mm
#7

Pentax SMC HD DA 20-40mm f/2.8-4 ED DC WR

Pentax SMC HD DA 20-40mm f/2.8-4 ED DC WR
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Fisheye No
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Aperture f/2.8
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Fixed aperture No
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Length 69 mm
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Max focal length 40 mm
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Diameter 71 mm
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Zoom range 2x
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Min focal length 20 mm
#8

Sigma 17-70mm f/2.8-4 DC Macro HSM Pentax K

Sigma 17-70mm f/2.8-4 DC Macro HSM Pentax K
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Fisheye No
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Aperture f/2.8
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Fixed aperture No
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Length 82 mm
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Max focal length 70 mm
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Diameter 79 mm
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Zoom range 4.1x
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Min focal length 17 mm
#9

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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Fisheye Yes
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Aperture f/3.5
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Fixed aperture No
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Length 71 mm
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Max focal length 17 mm
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Diameter 69 mm
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Zoom range 1.7x
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Min focal length 10 mm
#10

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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Fixed aperture
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The same maximum aperture at all focal lengths
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Fisheye No
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Aperture f/2.8
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Fixed aperture Yes
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Length 99 mm
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Max focal length 50 mm
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Diameter 84 mm
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Zoom range 3.1x
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Min focal length 16 mm