The advert cited a ranking made by a japanese university, not by Canon, and they could mail you the full report if you wished.
There is abundant literature on the matter: in the 70s in terms of coating Fuji and Pentax had an advantage of their competitors (tests from magazines of that era), including Nikon
Note that not Fuji. Their EBC method supposedly was able to deposit 11 layers of coatings on the lens surface but when the aforementioned "tests from magazines of that era" did a ranking, the lenses with the consistently lower percentage of flare were from Pentax and then Canon. Fuji was not leading the list.
Which brings me back on topic: We were discussing the resolution or sharpness of the lens, not their coatings. Any optical engineer will tell you that, for lenses with four or five or six lens groups, such as most prime lenses, single coating does just fine, and your average multicoating is just excellent. Flare performance is not just down to coatings; the lens design itself, as well as the construction and internal baffling, will have an influence.
ent Canon did in the late 60s, it was mainly to develop the remarkable F-1 (among the "pure mechanical" cameras probably my favourite) and the enormous FD system, remember they were more than 10 years behind Nikon, and of course the diamond head of the system were the aspherical designs like the FD55mm f1.2 L (I think they first one were hand grinded or something like that, they were bloody expensive), the 85 mm etc...all lenses that after the redesign after the introduction of the FDn are still in production in EF more or less unchanged I think.
Since you touch this topic, this is what Canon did at about 1968-1971:
- Developed a method of artificially growing flourite glass, and then released telephotos (FL-F line) that were vastly superior in performance to the previous state-of-the-art.
- Released the first production aspheric lens
- Developed methods to automatize grinding of aspheric surfaces (this is a major achievement. Leitz could not do this and thus had to release their late 50/1.2 lens using conventional surfaces, to the detriment of performance. Erwin Puts had an article of this.)
- Developed the standard zoom using a 2-group zooming configuration that had performance superior to the state-of-the-art and which was then copied by practically all manufacturers. (First one was the Canon 35-70 f2.8-3.5, a truly groundbreaking lens)
the 80s and the EF line brought even more innovations, and the designs are not the same, btw. Don't get started me on the EF line, or i'll have to post more blahblahblah!!
Cartman is NOT happy with you.
I don't care about Eric and his dissolute mom.