Lens category
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Lens mount
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Pentax K Lenses

#1

Pentax SMC FA 43mm f/1.9

Pentax SMC  FA 43mm f/1.9

"So far the results have been great. Nice and sharp. Great bokeh. Excellent lighted build quality." bhphotovideo.com

 
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Wide aperture
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f/1.9
 
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Quite short
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28 mm
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Min focal length 43 mm
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Max focal length 43 mm
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Fixed aperture n/a
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Length 28 mm
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Zoom range 1x
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Weight 156 g
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Aperture f/1.9
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Diameter 64 mm
#2

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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Min focal length 77 mm
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Max focal length 77 mm
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Fixed aperture n/a
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Length 48 mm
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Zoom range 1x
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Weight 269 g
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Aperture f/1.8
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Diameter 74 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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Great zoom range
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7.5x
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Min focal length 18 mm
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Max focal length 135 mm
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Fixed aperture No
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Length 76 mm
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Zoom range 7.5x
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Weight 405 g
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Aperture f/3.5
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Diameter 74 mm
#4

Pentax SMC DA* 300mm f/4 ED SDM

Pentax SMC  DA* 300mm f/4 ED SDM

"Stellar performer. Very sharp, and works well with in-body stabilisation, which is more noticable/effective at this focal length. Suprisingly good bokeh! This has now become my default lens bushwalking, with a shorter macro and wide prime in the bag. Very versatile thanks to close minimum focus distance. Not as big as imagined. About as heavy as expected (not light, but probably good for this class of lens). Overall GREAT and well worth the investment." bhphotovideo.com

 
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Great telephoto lens
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300 mm
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Min focal length 300 mm
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Max focal length 300 mm
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Fixed aperture n/a
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Length 183 mm
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Zoom range 1x
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Weight 1.1 kg
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Aperture f/4
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Diameter 84 mm
#5

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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Min focal length 55 mm
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Max focal length 300 mm
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Fixed aperture No
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Length 112 mm
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Zoom range 5.5x
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Weight 466 g
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Aperture f/4
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Diameter 71 mm
#6

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

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

"This lens is workhorses, very nice contrast, fast autofocus, WR is very nice, just like water proof, I took alot pictures during raining, white water rafting, biking." bhphotovideo.com

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Min focal length 18 mm
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Max focal length 55 mm
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Fixed aperture No
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Length 69 mm
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Zoom range 3.1x
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Weight 230 g
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Aperture f/3.5
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Diameter 69 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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Min focal length 20 mm
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Max focal length 40 mm
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Fixed aperture No
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Length 69 mm
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Zoom range 2x
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Weight 283 g
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Aperture f/2.8
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Diameter 71 mm
#8

Pentax SMC D FA 50mm f/2.8 Macro

Pentax SMC  D FA 50mm f/2.8 Macro

"As expected this is a fast, versatile lens for taking macro photographs." bhphotovideo.com

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Min focal length 50 mm
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Max focal length 50 mm
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Fixed aperture n/a
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Length 66 mm
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Zoom range 1x
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Weight 264 g
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Aperture f/2.8
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Diameter 66 mm
#9

Pentax SMC DA 17-70mm f/4 AL SDM

Pentax SMC  DA 17-70mm f/4 AL SDM

"The lens is well-made, the SDM focusing is fast and quiet (used on a Pentax K20D), images are sharp throughout the zoom range, the bokeh is pleasing, and the lens is weatherproof" 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 70 mm
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Fixed aperture Yes
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Length 94 mm
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Zoom range 4.1x
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Weight 485 g
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Aperture f/4
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Diameter 76 mm
#10

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

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

"Great lens, exactly as advertised. Easy to focus. Perfect for the camera body." bhphotovideo.com

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Min focal length 50 mm
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Max focal length 200 mm
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Fixed aperture No
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Length 79 mm
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Zoom range 4x
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Weight 286 g
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Aperture f/4
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Diameter 69 mm