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Telephoto focal length
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Lens category
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Pentax Lenses that have a 100mm or longer focal length

#1

Pentax SMC DA* 50-135mm f/2.8 ED SDM

Pentax SMC  DA* 50-135mm f/2.8 ED SDM

"Great lens for taking pictures of the kids, fast, smooth zoom and I don't have to be in their face to get a shot, very sharp pictures..." bhphotovideo.com

 
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Fixed aperture
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The same maximum aperture at all focal lengths
 
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Wide angle lens
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50 mm
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Max focal length 135 mm
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Length 137 mm
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Zoom range 2.7x
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Aperture f/2.8
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Fixed aperture Yes
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Weight 0.7 kg
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Min focal length 50 mm
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Diameter 76 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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Wide angle lens
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55 mm
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Max focal length 300 mm
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Length 112 mm
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Zoom range 5.5x
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Aperture f/4
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Fixed aperture No
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Weight 466 g
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Min focal length 55 mm
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Diameter 71 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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Quite short
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76 mm
 
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Wide angle lens
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18 mm
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Max focal length 135 mm
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Length 76 mm
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Zoom range 7.5x
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Aperture f/3.5
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Fixed aperture No
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Weight 405 g
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Min focal length 18 mm
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Diameter 74 mm
#4

Pentax SMC DAA 18-270mm f/3.5-6.3 ED SDM

Pentax SMC  DAA 18-270mm f/3.5-6.3 ED SDM
 
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Great zoom range
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15x
 
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Wide angle lens
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18 mm
 
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Quite short
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89 mm
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Max focal length 270 mm
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Length 89 mm
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Zoom range 15x
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Aperture f/3.5
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Fixed aperture No
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Weight 453 g
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Min focal length 18 mm
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Diameter 76 mm
#5

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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Quite short
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64 mm
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Max focal length 100 mm
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Length 64 mm
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Zoom range 1x
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Aperture f/2.8
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Fixed aperture n/a
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Weight 340 g
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Min focal length 100 mm
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Diameter 81 mm
#6

Pentax SMC HD D FA 150-450mm f/4.5-5.6 DC AW

Pentax SMC HD D FA 150-450mm f/4.5-5.6 DC AW
 
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Great telephoto lens
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450 mm
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Max focal length 450 mm
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Length 242 mm
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Zoom range 3x
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Aperture f/4.5
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Fixed aperture No
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Weight 2 kg
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Min focal length 150 mm
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Diameter 95 mm
#7

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

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

"I've used this lens now for about 1200 shots of lacrosse games taken in the evening/night under the lights, bright sun and cloudy days. Great resolution when the focus is spot on." bhphotovideo.com

 
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Fixed aperture
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The same maximum aperture at all focal lengths
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Max focal length 250 mm
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Length 168 mm
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Zoom range 4.2x
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Aperture f/4
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Fixed aperture Yes
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Weight 1 kg
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Min focal length 60 mm
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Diameter 81 mm
#8

Pentax SMC DA* 200mm f/2.8 ED SDM

Pentax SMC  DA* 200mm f/2.8 ED SDM

"Unbelievable image clarity with zero distortion. Impressive build and quality workmanship." bhphotovideo.com

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Max focal length 200 mm
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Length 135 mm
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Zoom range 1x
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Aperture f/2.8
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Fixed aperture n/a
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Weight 0.8 kg
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Min focal length 200 mm
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Diameter 84 mm
#9

Pentax SMC DA* 300mm f/4 ED SDM

Pentax SMC  DA* 300mm f/4 ED SDM

"Incredible! From the very first moment you look through the view-finder, you'll see the difference. It puts other lenses to shame, especially zooms. Razor sharp!" bhphotovideo.com

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Max focal length 300 mm
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Length 183 mm
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Zoom range 1x
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Aperture f/4
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Fixed aperture n/a
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Weight 1.1 kg
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Min focal length 300 mm
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Diameter 84 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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Quite short
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79 mm
 
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Wide angle lens
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50 mm
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Max focal length 200 mm
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Length 79 mm
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Zoom range 4x
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Aperture f/4
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Fixed aperture No
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Weight 286 g
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Min focal length 50 mm
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Diameter 69 mm