QUOTE (maxdance @ Apr 6 2007, 05:13 AM)
I can highly recommend the Tamron 90mm f/2.8 which, as previously mentioned, has been very highly rated by qualified testers. I have used it on a D70, D200 and S5pro to good effect and it will work perfectly well on your D70s. I have a lot of lenses and I consider this one to be particularly good value, gives nice bokeh for portraits too.
Deciding what you will shoot mostly with such a lens is usually the hardest point. From your initial description I would say something from 70 to 105mm on a APS-c body. You most likely do not want to be right in the persons face. I am a dentist and shoot macro of mouths etc, hehe, almost everyday. I find a 90-105mm more comfortable for both of us. also more room for flash or other lighting, a small detail, but if too close it is hard to light, unless you have a ring light at the end of the lens. I also use my macro lenses a lot outside of office for general shooting. If you do a lot of insects etc, you may even consider going to the 180-200mm macro lenses but these put too much room between you and a person for example. YMMV. I would not be too concerned about AF on a macro lens. Most of what you will shoot will be more or less still, except for an occasional blink and that won't make too much differenc. If you do use AF, put on focus range limiter if the lens has one, or you can expect much time to focus lock. I find I use small fstops like 11-22 mostly, sometimes even more if I need it. Hope this gives some other things to think about. Most companies today make excellent macro lenses and have historically. I have used lenses on my Canon 5D and 20D from 30 yrs ago, like an old Nikkor 105mm MF and it does great even compared to the newer Canon models I have used. These MF lenses can be had for a song today, well at least some of them, some newer ones like the Voigtlander and Zeiss are $$$, but unless you are crazy like me, it might not matter and most normal folk would pick an AF model for general use also. D