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Lens category
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Pentax Lenses that have a f/4 or faster aperture

#1

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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Length 38 mm
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Fisheye No
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Max focal length 50 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
#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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Length 38 mm
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Fisheye No
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Max focal length 50 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
#3

Pentax SMC FA 43mm f/1.9

Pentax SMC  FA 43mm f/1.9

"The build quality alone is just so superior; this little beauty is just a joy to handle." bhphotovideo.com

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Aperture f/1.9
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Length 28 mm
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Fisheye No
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Max focal length 43 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 43 mm
#4

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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Length 76 mm
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Fisheye No
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Max focal length 135 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
#5

Pentax SMC 60-250mm f/4 ED DA* SDM

Pentax SMC 60-250mm f/4 ED DA* SDM

"This is a universal lens for my purposes. I like it. I can take it anywhere. Survived my trip through europe so it is durable." bhphotovideo.com

 
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Great telephoto lens
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250 mm
 
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Fixed aperture
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The same maximum aperture at all focal lengths
 
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Great zoom range
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4.2x
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Aperture f/4
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Length 168 mm
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Fisheye No
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Max focal length 250 mm
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Fixed aperture Yes
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Diameter 81 mm
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Zoom range 4.2x
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Min focal length 60 mm
#6

Pentax SMC DA FA 100mm f/2.8 WR Macro

Pentax SMC  DA FA 100mm f/2.8 WR Macro

"I bought this in conjunction with the 160fc ringflash, perfect match for this lens.. Aside from being exellent at macro, I found this lens to be stuningly vibrant and contrasty for normal shooting.." bhphotovideo.com

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Aperture f/2.8
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Length 64 mm
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Fisheye No
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Max focal length 100 mm
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Fixed aperture n/a
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Diameter 81 mm
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Zoom range 1x
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Min focal length 100 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

"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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Aperture f/3.5
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Length 69 mm
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Fisheye No
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Max focal length 55 mm
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Fixed aperture No
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Diameter 69 mm
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Zoom range 3.1x
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Min focal length 18 mm
#8

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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Length 71 mm
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Fisheye Yes
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Max focal length 17 mm
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Fixed aperture No
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Diameter 69 mm
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Zoom range 1.7x
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Min focal length 10 mm
#9

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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Length 15 mm
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Fisheye No
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Max focal length 40 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
#10

Pentax SMC FA 77mm f/1.8

Pentax SMC  FA 77mm f/1.8

"Great multi-purpose performing lens, particularly if you want to travel light and leave the bag at home." 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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Length 48 mm
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Fisheye No
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Max focal length 77 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