The Fujinon ACM-21 is a lens adapter for the 1/2" CMOS chip PMW-EX3 camcorder. This adapter allows the 1/2" chip camera to utilize high quality 2/3" Fujinon lenses using the B4 mount.
Camcorders
This adapter will work with the Sony PMW-EX3 with 1/2" CMOS chips.
Broadcast Lenses
Broadcast lenses used with 2/3" HD cameras feature optics and image depth that is at a much higher quality than lenses designed for 1/2" camcorders. The upgrade in lens quality will upgrade the image to levels unprecedented in the 1/2" chip realm.