Archived posting to the Leica Users Group, 1998/02/11
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]In a message dated 98-02-11 15:07:50 EST, Erwin writes: << I wonder why a 2.8/28 is considered a slow lens and a 2.8/280 is fast one. I would not regard the TriElmar as retrogressive just by taking a look at one parameter: the full aperture value. If that were the only criterium consider every medium format camera hopeless out of times and unworthy of any place in this high speed world. ======================================================== >> Erwin - You know the answer to that as well as anyone ------------------ In optical theory, a 2.8/28 lens has to be only 1" in diameter whereas a 2.8/280 has to be about 10" and therefore weigh a ton ------------------ Can you imagine a 280mm Noctilux f:1 ???? 28 inches in diameter !!!! As for medium & large format photography, the larger formats are used for a different purpose than available light, which is the "forte" of Leica. Marvin