Quote:

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Quote from RW.

Quote:

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M42 Screw to Canon EF mount adaptor
For using the 50/1.4 Planar T* ZS lens on Canon EOS cameras, it offers manual focus, and manual stop down metering only.

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Or

Quote:

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Rayqual Nikon AI to Canon EF Adaptor
To use Zeiss ZF Nikon AI fit lenses on Canon EOS bodies. Supplied with Canon EF fit rear cap

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Not exactly making EF mount lenses.

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But they don't claim to be making EF mount lenses...

These lenses are designed for Nikon (ZF) and Pentax (ZS & ZK) manual focus cameras. RW are merely offering the adaptors for those who may wish to use these lenses with Canons EOS system. AFAIK the only AF Zeiss lenses are those they make for the Sony A-mount system - though I'm sure that there'd be a market for Zeiss glass in Canon-EF mount...