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Pentax Lenses that have a 300mm or longer focal length and have a f/4 or faster aperture

#1

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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Great zoom range
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5.5x
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Max focal length 300 mm
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Length 112 mm
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Aperture f/4
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Weight 466 g
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Min focal length 55 mm
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Diameter 71 mm
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Zoom range 5.5x
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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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Max focal length 300 mm
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Length 183 mm
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Aperture f/4
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Weight 1.1 kg
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Min focal length 300 mm
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Diameter 84 mm
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Zoom range 1x
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Auto focus Yes