The top-quality Four-Thirds zoom lenses made by Olympus are in a class by themselves. While they require a Panasonic or Olympus Micro 4/3 adapter to work with the AF100, the lens' AFS auto-focus, aperture control, and remote operation all work as on a native M4/3 lens. I have the following lenses and highly recommend them all:
Olympus 35-100mm f2.0 zoom lens (yes, it's f2.0, not a typo)
http://www.thewsreviews.com/2008/09/olympus-35-100mm-f20.html
Olympus 50-200mm f2.8-3.5 zoom lens
http://www.photozone.de/olympus--four-thirds-lens-tests/454-oly502002835
Olympus 14-54mm f2.8-3.5 zoom lens
http://www.slrgear.com/reviews/showproduct.php/product/1239/cat/15
I've tried out the following lens but don't yet own one:
Olympus 14-35mm f2.0 zoom lens
http://www.photographyblog.com/reviews/zuiko_digital_ed_14_35mm_f2_0_swd_review/
Olympus 35-100mm f2.0 zoom lens (yes, it's f2.0, not a typo)
http://www.thewsreviews.com/2008/09/olympus-35-100mm-f20.html
Olympus 50-200mm f2.8-3.5 zoom lens
http://www.photozone.de/olympus--four-thirds-lens-tests/454-oly502002835
Olympus 14-54mm f2.8-3.5 zoom lens
http://www.slrgear.com/reviews/showproduct.php/product/1239/cat/15
I've tried out the following lens but don't yet own one:
Olympus 14-35mm f2.0 zoom lens
http://www.photographyblog.com/reviews/zuiko_digital_ed_14_35mm_f2_0_swd_review/