Thanks for the discussion. So far, my finding is:
AFD 60mm micro
- 9 inch minimum focus distance
- distortion about 10-20%
- effective aperture ??
- good for copy work, flowers
AFD 105mm micro
- 1 feet minimum focus distance
- less distortion
- effective aperture F5
- good for flowers, insert, maybe portraits
Haha, if money no problem, what should I get?
Also, does these micro lens easily attract dust "inside" the lens barrel?