Konica AR - Canon EF mount adapter

Adapter to mount Konica AR lenses onto Canon EF or Canon EF-S mount EOS cameras. Autofocus is not available and the lens has to be used in stop-down metering mode. Due to the shorter flange focal distance of Konica cameras, the adapter requires a lens element to permit infinity focus. I have only found one such adapter, which seems to have a magnification factor of 1.4. Does somebody have experience with this adapter or know of other Konica AR - Canon EF adapters?

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