Vivitar 28mm f/2.8 MC Close Focus Wide Angle - Sample Images
Info and Reviews:
Introduced: ??
Optical design: ?? elements in ?? groups
Lens mount: M42, Pentax K
Covers: Full-frame (24×36mm)
More info / Review:
http://www.pentaxforums.com/userreviews/vivitar-28mm-f-2-8-close-focus.html
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ISO: 200
Camera: Pentax K-x
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ISO: 200
Camera: Fujifilm X-E1
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ISO: 200
Camera: Olympus E-M5
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ISO: 320
Camera: Olympus E-M5
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ISO: ??
Camera: Canon EOS M
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ISO: 200
Camera: Pentax K-r
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ISO: 400
Camera: Panasonic DMC-G5
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ISO: 800
Camera: Panasonic DMC-G5
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ISO: 400
Camera: Pentax K-01
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ISO: 800
Camera: Pentax K-r
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ISO: 800
Camera: Pentax K-r
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ISO: 800
Camera: Pentax K-r
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ISO: 200
Camera: Fujifilm X-E1
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ISO: 200
Camera: Fujifilm X-E1
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ISO: 200
Camera: Fujifilm X-E1
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ISO: 200
Camera: Fujifilm X-E1