The 24 arrived today and I plan to put it through its paces but I do have one quick observation...holy cr@p that is one heavy lens. It must weigh twice what my Hexanon 24 weighs. It actually feels pretty nice in the hand but the weight is really a shock because it's a pretty compact lens. The 100 I have had for a few days and it is really growing on me. I have never really been a fan of the 100mm FL but I am definitely changing my mind about that now. The IQ is nice, sharp wide open and dreamy smooth backgrounds. The Rokkor 100/2.5 (both handheld in low light). It's a remarkably easy lens to keep steady. Snaggle by dixeyk, on Flickr Dozer by dixeyk, on Flickr I have only fired off a few shots with the 24 and so far the color is consistent and matches my other Rokkors. I also feel like it has a bit less contrast and in some ways the IQ reminds me of my 35-70/3.5 macro (that's a good thing). The build is lovely and despite feeling like it weighs five pounds it is very nice in hand.