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pixco Camera Adapter For RMS Royal Microscopy Society Lens to M42 Mount Adapter (20mm) : Amazon.co.uk: Electronics & Photo
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S-M-C/Super Takumar 20mm F4.5 Reviews - M42 Screwmount Extreme Wide-Angle Primes - Pentax Lens Reviews & Lens Database
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Carl Zeiss Flektogon f2.8 20mm in M42 mount. One of the most sought after Wide Angle lenses. It's rare to find a copy which is… | Wide angle lens, Wide angle, Zeiss
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S-M-C/Super Takumar 20mm F4.5 Reviews - M42 Screwmount Extreme Wide-Angle Primes - Pentax Lens Reviews & Lens Database
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Vivitar 20mm f3.8 manual focus wide angle M42 screw mount lens + makers front cap & lens case. UNCOMMON – MW Classic Cameras
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Carl Zeiss Jena DDR 20mm f2.8 Flektogon MC manual focus M42 screw mount lens + caps – MW Classic Cameras
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