Telephoto focal length
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Pentax K Lenses that have a 100mm or longer focal length and have a f/2.8 or faster aperture

#1

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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Supports autofocus
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Easier to use
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Max focal length 100 mm
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Length 64 mm
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Aperture f/2.8
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Diameter 81 mm
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Auto focus Yes
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Weight 340 g
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Min focal length 100 mm
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Zoom range 1x
#2

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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Supports autofocus
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Easier to use
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Max focal length 200 mm
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Length 135 mm
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Aperture f/2.8
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Diameter 84 mm
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Auto focus Yes
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Weight 0.8 kg
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Min focal length 200 mm
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Zoom range 1x
#3

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

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

"The build quality seems top notch, no play in the focus or zoom rings at all, and very smooth action of both." bhphotovideo.com

 
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Supports autofocus
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Easier to use
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Max focal length 135 mm
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Length 137 mm
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Aperture f/2.8
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Diameter 76 mm
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Auto focus Yes
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Weight 0.7 kg
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Min focal length 50 mm
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Zoom range 2.7x
#4

Pentax SMC HD D FA* 70-200mm f/2.8 ED DC AW

Pentax SMC HD D FA* 70-200mm f/2.8 ED DC AW
 
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Supports autofocus
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Easier to use
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Max focal length 200 mm
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Length 203 mm
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Aperture f/2.8
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Diameter 92 mm
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Auto focus Yes
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Weight 1.8 kg
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Min focal length 70 mm
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Zoom range 2.9x
#5

Samyang 135mm f/2 ED UMC Pentax K

Samyang 135mm f/2 ED UMC Pentax K
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Max focal length 135 mm
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Length 121 mm
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Aperture f/2
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Diameter 82 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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Zoom range 1x
#6

Sigma 300mm f/2.8 EX DG Pentax K

Sigma 300mm f/2.8 EX DG Pentax K

"It's much much sharper, even with a 1.4 TC. I highly recommend this lens." bhphotovideo.com

 
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Great telephoto lens
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300 mm
 
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Supports autofocus
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Easier to use
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Max focal length 300 mm
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Length 213 mm
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Aperture f/2.8
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Diameter 119 mm
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Auto focus Yes
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Weight 2.4 kg
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Min focal length 300 mm
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Zoom range 1x
#7

Tamron 70-200mm f/2.8 Di LD Macro Pentax K

Tamron 70-200mm f/2.8 Di LD Macro Pentax K

"Very nice lens, sharp in all range/all apertures, nice bokeh, decent focus speed, good built, equipped very well, cheap, not having any problems with it." bhphotovideo.com

 
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Supports autofocus
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Easier to use
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Max focal length 200 mm
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Length 193 mm
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Aperture f/2.8
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Diameter 89 mm
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Auto focus Yes
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Weight 1.1 kg
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Min focal length 70 mm
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Zoom range 2.9x
#8

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

Placeholder
 
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Supports autofocus
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Easier to use
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Max focal length 135 mm
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Length n/a
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Aperture f/2.8
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Diameter n/a
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Auto focus Yes
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Weight 0.7 kg
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Min focal length 50 mm
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Zoom range 2.7x
#9

Rokinon 100mm f/2.8 Macro Pentax K

Rokinon 100mm f/2.8 Macro Pentax K
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Max focal length 100 mm
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Length 122 mm
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Aperture f/2.8
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Diameter 73 mm
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Auto focus No
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Weight 0.7 kg
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Min focal length 100 mm
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Zoom range 1x
#10

Rokinon 135mm f/2 ED UMC Pentax K

Rokinon 135mm f/2 ED UMC Pentax K
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Max focal length 135 mm
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Length n/a
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Aperture f/2
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Diameter n/a
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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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Zoom range 1x