SMC Pentax-M Macro 50mm f/4 - Sample Images
Info and Reviews:
Made between: 1977 - 1984
Optical design: 4 elements in 3 groups
Lens mount: Pentax K
Covers: Full-frame (24×36mm)
More info/ Review:
http://www.pentaxforums.com/lensreviews/SMC-Pentax-M-50mm-F4-Macro-Lens.html
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ISO: 100
Camera: Pentax K10D
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ISO: 400
Camera: Pentax K-x
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ISO: 80
Camera: Pentax K-5
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ISO: 80
Camera: Pentax K-5
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ISO: 100
Camera: Pentax K10D
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ISO: 400
Camera: Pentax K-30
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ISO: 200
Camera: Pentax K-x
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ISO: 400
Camera: Pentax K-x + macro tube
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ISO: 200
Camera: Pentax K-500
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ISO: 800
Camera: Pentax K-500
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ISO: 100
Camera: Pentax K-500
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ISO: 200
Camera: Pentax K-500
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ISO: 200
Camera: Pentax K-30
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ISO: 400
Camera: Pentax K-x
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ISO: 100
Camera: Sony ILCE-6000
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ISO: 100
Camera: Pentax K10D
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ISO: 200
Camera: Pentax K-500
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ISO: 100
Camera: Sony ILCE-6000
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ISO: 100
Camera: Sony ILCE-6000
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ISO: 100
Camera: Sony ILCE-6000
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ISO: 125
Camera: Sony ILCE-6000
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ISO: 125
Camera: Sony ILCE-6000
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ISO: 200
Camera: Pentax K20D
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Analog film: Fuji Pro 160S
Scanner: ??