Our very nice friends from www.forum-olympus-france.com made a Über-comparison of seven(!) Zuiko Lenses:
- OM Zuiko 28mm f3.5
- OM Zuiko 50mm f1.8 OM Zuiko 50mm f1.8
- OM Zuiko 100mm f2.8 OM Zuiko 100mm f2.8
- OM Zuiko 135mm f2.8 OM Zuiko 135mm f2.8
- Zuiko Digital 12-60mm f2.8-4
- Zuiko Digital 70-300mm f4-5.6 Zuiko Digital 70-300mm f4-5.6
- OM Zuiko 50mm f1.4 OM Zuiko 50mm f1.4
Read the original french text or the google english translation.
Nice work!