Laser marking instructs you how to identify brand lenses
Carl Zeiss AG - Wikipedia
Sony Sonnar T* FE 55mm f/1.8 ZA Lens | SEL55F18Z
ZEISS Planar T* 50mm f/1.4 ZE Lens for Canon EF 1677-817 B&H
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Lenses - independent optical
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Amazon.com : Sony SAL-85F14Z 85mm f1.4 Carl Zeiss Planar T Coated Telephoto Lens for Sony Alpha Digital SLR Camera : Digital Slr Camera Lenses : Electronics