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vhbw Lens Cap Set Compatible with Carl Zeiss Tessar 2.8/50 Zebra Sonnar 3.5/135 Lens Caps, Black Plastic Front and Back Cover : Amazon.com.be: Electronics
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Carl Zeiss Jena Tessar (modified mount) 1Q 8 iris 50mm F2.8 Lens Reviews - Carl Zeiss Lenses - Pentax Lens Review Database
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