Archived posting to the Leica Users Group, 1998/07/08
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Minor point perhaps, but lens coatings should have some effect on lens contrast. Isn't that their purpose? Dan C. At 09:49 AM 08-07-98 -0400, Marc wrote: >I am quite certain that the optical formula of the DR Summicron was >unchanged through its existence. It is almost certain that the coating >composition was changed from time to time, as is the rule with virtually >all lenses -- almost every manufacturer varies this with some frequency. >But all that a change in coatings would cause is a change in the colour >transmission of the lens: it would have no effect whatsoever on the >sharpness, contrast, or other optical parameters of the lens.