Does anyone know if the Fujinon ACM-18 1/2" lens adapter will work with Sony F350 XDCAM to use B4 2/3" lens? Do the EX3 B4 lens adapter also work on the F350? I'm looking for a economical alternative to the obvious high priced Sony solution. Thanks.

here you go:
ZGC - Lens Adapters | Sony 2/3" to Sony 1/2" Video Camera Lens Adapter (http://zgc.com/webstore.nsf/productsseo/mtf-mtson23325327.html)

2/3" B4 to Sony 1/2" adapter

Also,
Century Precision Optics LA-23S5 2/3" 0LA-23S5-00 B&H Photo

I have this adapter:
Sony LO-32BMT 2/3" to 1/2" Lens Mount Adapter LO32BMT

for my F350.
Is this the high priced adapter you are referring to?

ACM-18 or ACM-21 will not work on the XDCAM HD PDW-F series camcorders, those adapters are only for the EX3.

Thanks. Appreciate your help.