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A black and white portrait of a man

Pentax K Portrait lenses for less than $500 that have a f/2 or faster aperture

#1

Pentax SMC DA 50mm f/1.8

Pentax SMC  DA 50mm f/1.8
 
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Supports autofocus
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Easier to use
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Aperture f/1.8
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Max focal length 50 mm
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Auto focus Yes
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Weight 122 g
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Min focal length 50 mm
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Length 38 mm
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Diameter 64 mm
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Zoom range 1x
#2

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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Supports autofocus
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Easier to use
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Aperture f/1.4
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Max focal length 50 mm
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Auto focus Yes
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Weight 221 g
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Min focal length 50 mm
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Length 38 mm
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Diameter 64 mm
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Zoom range 1x
#3

Rokinon 135mm f/2 ED UMC Pentax K

Rokinon 135mm f/2 ED UMC Pentax K
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Aperture f/2
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Max focal length 135 mm
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Auto focus No
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Weight 0.8 kg
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Min focal length 135 mm
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Length n/a
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Diameter n/a
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Zoom range 1x
#4

Samyang 50mm f/1.4 AS UMC Pentax K

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Supports autofocus
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Easier to use
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Aperture f/1.4
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Max focal length 50 mm
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Auto focus Yes
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Weight 0.5 kg
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Min focal length 50 mm
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Length n/a
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Diameter n/a
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Zoom range 1x
#5

Samyang 85mm f/1.4 Pentax K

Samyang 85mm f/1.4 Pentax K
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Aperture f/1.4
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Max focal length 85 mm
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Auto focus No
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Weight 0.5 kg
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Min focal length 85 mm
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Length 73 mm
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Diameter 78 mm
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Zoom range 1x