I'm adding a 75mm lens to my kit and wonder if I should be paying attention to brand so as to have matching color rendition, or if this is a level of pickiness that I can ignore. I scan most of my work before sending to clients anyway, then play with it in photoshop anyway. I've only got one client I work with every year or so that wants the original transparencies. I've got a 55mm Rodenstock, a 90mm Super Angulon XL, 150mm Fujinon W, and 250mm Fujinon 6.3. I'm considering any of the modern 75mm f/4.5-5.6 lenses - Rodenstock, Scheider SA, Fujinon SWD, or Nikkor SW. The Nikkor gets excellent comments from those who have used it, but then I'd have collected the complete set of brands! To be honest, I've not shot the same setup on all the different lenses on transparency film for a test of my own, and I could do that, but I thought I'd take the temperature of the forum first.