Grass Valley LDK 7500 User Guide - Manual (Page 52)

5-4 FilmStream mode Viper
functions to be performed are:
• Framing
• Focussing
• Shutter angle
• Internal optical filters (if required)
• Start recording
Framing
Because the picture displayed in the viewfinder (and on the monitors)
is directly derived from the electronic signal from the sensors, it is a
perfect representation of the captured shot regardless of the position
of the viewfinder. (The viewfinder causes no light loss or reflections
and does not have to be physically aligned.)
Focussing
A tape measure stud on the lens adapter provides a reference for the
optical plane.
To assist with optical focussing through the viewfinder, use the VF
Zoom button on the left-front of the camera to enlarge the centre of the
viewfinder image.
A crawler function (that can be switched on or off in the VF menu) adds
motion in the viewfinder to objects in sharp focus.
Light exposure
The camera has a sensitivity that is equivalent to a film sensitivity of
about 320ASA (400ASA for super wide-angle). Use the zebra function
in the viewfinder picture to identify overexposed areas.
The sensitivity of the camera is also influenced by the shutter angle you
select.
Shutter angle (exposure time)
Operating the camera