Summary: This is an excellent accessory for owners of the now iconic Sony R1 digital camera. The R1 has achieved cult status among photographers largely because of the extraordinary quality of the Zeiss zoom lens it carries. Also, at the time it was made, its sensor was state of the art.
Summary: Image quality is excellent with no discernible drop from that of native lens. Build quality is good. Enables ultra wide shots suitable for real estate and architectural work (equivalent to 19mm in 35mm film). Needs a VAD-RA adapter - is still available - I sourced mine from the UK.