Auto Mamiya-Sekor 55mm f/1.8 - Sample Images
Info and Reviews:
Made between: mid-1960s through the early 1970s
Optical design: 6 elements in 4 groups
Lens mount: M42
Covers: Full-frame (24×36mm)
More info:
http://www.pentaxforums.com/userreviews/mamiya-auto-mamiya-sekor-55mm-f-1-8-m42.html
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ISO: 100
Camera: Canon EOS 60D
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Camera: Sony ILCE-7R
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ISO: 400
Camera: Canon EOS 5D
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ISO: 200
Camera: Olympus E-P2
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ISO: 200
Camera: Olympus E-M5MarkII
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Camera: Panasonic DMC-GH2
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Camera: Sony a6000
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ISO: 400
Camera: Canon EOS 5D
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ISO: 400
Camera: Pentax K-5 + Macro tubes
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Camera: Pentax K-5 + Macro tubes
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Camera: Pentax K-5 + Macro tubes
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ISO: 800
Camera: Pentax K-5 + Macro tubes
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ISO: 200
Camera: Pentax K-5
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Camera: Pentax K-5
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ISO: 100
Camera: Sony NEX-5R
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ISO: 100
Camera: Canon EOS 7D