Electronic variable ND?? This sounds quite intriguing.
Sony released two new HD cameras in the XDCAM series of cameras today at Broadcast Asia in Singapore. The PXW-X160 and X180 both feature three 1/3″full HD Exmor CMOS sensors. A 25x zoom (26mm-650mm 35mm equivalent) lens and a world first electronic variable ND that is adjustable from 1/4 ND to 1/128ND giving you the ability to control depth of field and brightness while maintaining a constant aperture. The details of this system are complex and we hope to find out more in the coming days.
via: http://www.newsshooter.com/2014/06/...first-in-built-electronic-variable-nd-filter/