The notion of close range correction for ultrawides by using floating elements was certainly first on the market in the 1960s ... I have been under the impression that the Nikkor-N 24mm f/2.8 was the first in this genre (released in 1967) and that all others followed it to market.
A short treatise on this lens can be seen at: http://www.nikon.co.jp/main/eng/portfolio/about/history/nikkor/ n14_e.htm G On Feb 14, 2007, at 4:41 AM, David Weiss wrote: > Didn't know they had that type of design back then, always thought > that > was more of a modern design. Nice. I notice on Boj's site that the > resolution numbers are slightly better for the "m", so I suppose the > compromises they made were well done. Perhaps it is not quite as good > wide open? As soon as the weather breaks, I am going to find out > how it > performs wide open. > >> The K28/2 was an all out expensive floating >> element design which optimizes image quality >> at all focussing distances and apertures -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
