Archived posting to the Leica Users Group, 2001/01/08
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Jesse Hellman jotted down the following: > Regarding Rob's comment that red focuses at a plane different from that > of other colors, does this mean that there would be little use for an > apo lens in black and white printing on variable contrast papers, where > red does not register and the emulsions are sensitive to green and blue? I asked this question about a year ago and received a storm of answers from people who adamantly maintained that APO enlarger lenses provided much better results that their non-APO counterparts, yet no one was able to provide a rational explanation as to why this would be the case. M. - -- Martin Howard | "Why don't they make gravestones Visiting Scholar, CSEL, OSU | cheerier?" email: howard.390@osu.edu | -- Nigel Tufnel www: http://mvhoward.i.am/ +---------------------------------------