Pxw-Fs7 Ii And The Variable Nd Filter - Sony PXW-FS7 Quick Reference Manual

D. Preparing the camera and shooting
D8.1 PXW-FS7 II and the variable ND filter
The PXW-FS7 II has an advanced variable ND filter system.
When the filter dial is in the clear position there is no
additional filtration in the optical path. When you select
ND filter dial position 1, 2 or 3 the variable ND filter system
is inserted into the optical path.
When the ND filter switch is set to preset you the filter
provides 3 preset levels of ND filtration: 2 = 1/4ND (2
stops), 3 = 1/16ND (4 stops) and 4 = 1/64ND (6 stops).
However if you wish you can change these preset ND
levels in the menu
(MENU: Camera -ND Filter).
Switching the ND filter switch to Variable allows you to
use the IRIS/ND Dial to vary the amount of ND filtration
smoothly and seamlessly from 1/4ND (2 stops) to 1/128ND
(7 stops). The variable function allows you to use the
aperture you desire for the best depth of field or lens
performance and then finely control the exposure via the
variable ND filter.
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