On 21/10/02 at 11:04, [EMAIL PROTECTED] (Kotsinadelis, Peter (Peter)) wrote:
> The original Nikkor 105 F2.5 (1949) according to Nikon > http://www.nikon.co.jp/main/eng/society/nikkor/n05_e.htm > is a Sonnar-type or long Sonnar, Ok, that's the one I've got. > but the newer AI Nikkor 105mm f/2.5 lens is > a design based on the Xenotar-type lens (5 elements, 4 groups) with thick, > convex lenses, rather than the Sonner type with its many asymmetric > components. > > The new EF Canon 50mm F1.4 is the one I mention is a Planar-type. Not sure > about which older one. I know the 50mm Serenar 1.5 is also based on the > Sonnar. If you mean the original Canon Serenar F3.5 that it is a Tessar type > (4 elements, 3 groups). My own old Canon rangefinder lens is the 50/1.4, whch supposedly superceded their own 50/1.5 Sonnar derivative. > Another good book to give you some more detail is Kingslake's Lenses in > Photography. Goes into explaining much theory but has history as well and > may be more easily found. > > Hey Joe, good trivia question for you. What company was the first to > produce a commercial lens Made in Japan? > > Peter K Ok, my guess is- the USA. Joe B. * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
