Originally posted by mrmentera Some of the substances they had in old glass are not allowed to use anymore cause they are harmful to the environment.
Later glass has different optical properties and old lensformulas cant be used then.
Read it on some forum. Donīt know if its true.
That is not true. Those lenses have not been out of production that long. Besides, the FA 43mm LTD, FA 50/1.4, FA 35/2, FA 77/1.8 ltd and FA 31/1.8 LTD would be in the same plight if it were. Before you start up on old optical formulae, new doesn't automatically mean better. The DA 40mm LTD is only ~ 4 years newer than some of the FA ltd lenses.