Archived posting to the Leica Users Group, 1997/12/17
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 09:05 PM 12/17/97 -0500, Dan Post wrote: >Good question, but then I was looking in a book about lenses, and I saw the >diagrahm of the Hologon 16mm/f8! A wide angle, but what a chuck of glass- >the computer designed lens has so much glass in it that there is no room for >an aperture/iris! Well, 'computer designed' is subject to qualification here: all lenses have been 'computer designed' for the past several decades, so there is nothing remarkable in that aspect. Of course, being a Zeiss lens, it has been designed and redesigned and redesigned a zillion times to get as close to perfection as is commercially possible -- probably burned out a dozen computers along the way, as Zeiss put a LOT of energy into this design. The lack of an iris is a function of the Hologon design, incidentally, and isn't caused by anything as mundane as mere mechanical location. Marc msmall@roanoke.infi.net FAX: +540/343-7315 Cha robh bas fir gun ghras fir!