On 2/24/07 4:32 PM, "Joseph Tainter", <[EMAIL PROTECTED]> wrote:
> This is not what I understood previously. > I tought DFA 50mm was indeed the same design as FA50 but that the DFA > 100 was Tokina collaboration? > > ----- > > FA 50 F2.8 Macro: 8 elements, 7 groups. > D FA 50 F2.8 Macro: 7 elements, 6 groups. > > And I believe Ken reported that the D FA 100 F2.8 Macro was Pentax's design. One of the Pentax designers confirmed that FA and DFA macros were the same, except the barrel design (which was cheapened in order to stop bleeding). I do not remember well whether this was for 100mm or 50mm or both. I thought it was for both. But if 50mm has different lens formula between FA and FDA, I will ask them again. I did not know that FDA had one lens less. Ken -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
