Forsale is the legendary Contax G Biogon 21 mm lens modified to M mount by masterHawk. It's 95% new overall with clean and clear glass. Beautifully modified (noswung head when focusing) and 6 bit-coded. Comes with original Contax front capand a extended back cap. Asking HK$9.5k. An original 55mm skylight filter inuser condition come as gift. Interesting parties please contact through PM.