Auto Sears MC 135mm f/2.8 - Sample Images
Info and Reviews:
Introduced: ??
Optical design: 4 elements in 4 groups
Lens mount: M42, Nikon F (FX, DX), Pentax K and probably more mounts that was popular at the time.
Covers: Full-frame (24×36mm)
More info:
http://allphotolenses.com/lenses/item/c_623.html
http://allphotolenses.com/lenses/item/c_959.html
Review:
http://www.pentaxforums.com/userreviews/sears-135mm-f2-8-auto-multicoated.html
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ISO: 160
Camera: Canon EOS 6D
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ISO: 100
Camera: Canon EOS 6D
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ISO: 320
Camera: Canon EOS 6D
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ISO: 640
Camera: Canon EOS 6D
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ISO: 100
Camera: Canon EOS 6D
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ISO: 200
Camera: Canon EOS 6D
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ISO: 200
Camera: Pentax K10D
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ISO: 200
Camera: Pentax K-r
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ISO: 160
Camera: Pentax K-30
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ISO: 1600
Camera: Pentax K-30
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ISO: 200
Camera: Pentax K-30
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ISO: 160
Camera: Pentax K-30
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ISO: 100
Camera: Pentax K-30
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ISO: 100
Camera: Pentax K-30
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ISO: 100
Camera: Pentax K-30
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ISO: 200
Camera: Fujifilm X-E1
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ISO: 1250
Camera: Pentax K-30
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ISO: 100
Camera: Canon EOS 6D
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ISO: 640
Camera: Canon EOS 6D