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Focus motor
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Pentax Lenses for less than $100 that have a focus motor and have a f/4 or faster aperture

#1

Pentax SMC DA 50mm f/1.8

Pentax SMC  DA 50mm f/1.8
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Aperture f/1.8
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Length 38 mm
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Focus motor Generic motor
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Weight 122 g
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Min focal length 50 mm
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Diameter 64 mm
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Max focal length 50 mm
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Auto focus Yes
#2

Pentax SMC 35mm DA L f/2.4 AL

Pentax SMC 35mm DA L f/2.4 AL
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Aperture f/2.4
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Length 46 mm
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Focus motor Generic motor
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Weight 125 g
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Min focal length 35 mm
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Diameter 64 mm
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Max focal length 35 mm
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Auto focus Yes