Originally posted by Bertrand3000 Interesting. Since I shoot handled, a Macro lens of a lesser focal length would be a good idea. That said, the Tamron 90 Macro (or DFA 100 Macro) are also very good and fast telephoto lens, something that DA 35 Macro and DFA 50 Macro would not provide.
That's why it's your decision, right?
I would definitely agree that the 35 macro is not the best macro lens for everyone, but since 100 mm is conventional wisdom I wanted to throw in my 2 cents. It all depends on what you want to do with it. Both focal lengths have their own set of compromises, so you have to pick which compromises you prefer.
When it comes to close-up/macro, I shoot plants, mushrooms, and flowers (etc) handheld, outdoors, in natural light, most often under cloud cover or a dense tree canopy. (Usually 'on the run' because it's really rare that I'm out by myself and can take all the time I want, so taking the time to set up even a tripod is usually not an option). The 35 can tolerate a slower shutter than the 100 with respect to camera motion and, all else being equal, the 35 gives me more DOF, so I don't have to stop down as much. These are two big advantages
for how I shoot. If I were shooting flying critters, using a flash, or on a tripod, I'd be all over a 100 mm. But I had one (Kiron 105) and it just frustrated me in my use case.
The other thing I like about the 35 (I think I mentioned it) is that it's a good normal focal length, so I can use it for landscapes and "intimate landscapes" too.
So it's all about your shooting style, and which set of compromises you want. As for me, I'm quite thankful that Pentax has given us a couple of excellent choices!