1. First of all, see the ever thinnest Full Frame lens on a very thin film SLR body!Full compatability with all the supported functions is ensured for the above combo!The mount is made of metal, but surely it is not stainless steel. I suspect it is made of aluminium or brass, which is then coated later:-Btw, the overall build quality of this lens is indeed cheap.And the total weight is.. (Without
