Andre wrote: Could the difference in saturation be caused by a slight difference in exposure (because of diaphragm margin of error)?
Could be, but certain VMC coating formulations--or is it the glass?--produced consistently more saturated colors. I can tell at a glance, for example, which of my 28mm prints had been taken by my Series One 28/1.9 or my former Kiron 28/2. It would be instructive to compare a Series One lens against its non-Vivitar twin; presumably they used different coatings. Thus, we'd want to compare the Kiron (1980) against the Vivitar 28/2 (1983), compare the Kiron 105/2.8 macro against the Vivitar Series One 105/2.5 macro, and compare the Tokina AT-X 90/2.5 macro against the Vivitar Series One 90/2.5 macro. The Tokina is no slouch in the saturation department; it has that Nikon-like warmth that makes everyone look as though they've been out in the sun. Fred, you own both macros; is the coloring the same? Of course, these Vivitars were made by Kino Precision Optical and Tokina; I don't know whether those companies would actually change coatings when rebadging their lenses. Kiron also made the 28/1.9 (VMC-coated), so as early as the late 70s Kino knew a thing or two about producing coatings that yielded strong color. [EMAIL PROTECTED]
