Lens category
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Focus motor
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Type

Prime Lenses that have a Pentax SDM focus motor

#1

Pentax SMC 55mm f/1.4 DA* SDM

Pentax SMC 55mm f/1.4 DA* SDM

"I love the lens in almost all ways. It's sharp, fast focusing, needs very little light in F1.4 and the quick shift to manual focus is really OK to have." bhphotovideo.com

 
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Wide angle lens
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55 mm
 
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Wide aperture
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f/1.4
 
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Quite short
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66 mm
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Focus motor Pentax SDM
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Length 66 mm
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Min focal length 55 mm
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Weight 375 g
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Aperture f/1.4
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Diameter 71 mm
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Max focal length 55 mm
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Auto focus Yes
#2

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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Focus motor Pentax SDM
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Length 183 mm
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Min focal length 300 mm
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Weight 1.1 kg
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Aperture f/4
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Diameter 84 mm
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Max focal length 300 mm
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Auto focus Yes
#3

Pentax SMC DA* 200mm f/2.8 ED SDM

Pentax SMC  DA* 200mm f/2.8 ED SDM

"Extremely well built, weather sealed, fast, and sharp at all F-stops." bhphotovideo.com

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Focus motor Pentax SDM
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Length 135 mm
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Min focal length 200 mm
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Weight 0.8 kg
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Aperture f/2.8
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Diameter 84 mm
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Max focal length 200 mm
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Auto focus Yes