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Log F (Advanced Mode)
The Log F characteristic curve provides a signal
according to Filmstream™ specifications. This
characteristic is intended for HD workflows adapted to
Filmstream™ signals. Log F delivers an ISO equivalent/
EI of 200. When Log F is used, the EI cannot be adjusted
in the camera. The tonal balance of the signal has to
be adjusted using LUTs or through color correction.
Recommended Log F Setup
HD-SDI Mode: HD444 up to 30PsF
•
Output Range: Extended Range
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Color Matrix: LOG
•
Note: As with Log C, the correct lens aperture
should be determined using an exposure
meter. On a waveform display, the mid-tones
of a correctly exposed image will be offset
and highlights will not reach the maximum
signal level due to the given specifications.
Note: To correctly preview the material on an
HD monitor a Filmstream™/lin conversion
LUT, optionally also adjusting the EI, has to
be applied on the signal. As the D-21 only
adopts the characteristic curve, the camera
image will not show a green color cast.
Note: This characteristic curve has been designed by
a different company and for a different camera.
It is not optimized for the ARRIFLEX D-21.
0
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Input
O
u
tp
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t
clipping level
black level
18% grey
LOG F characteristic curve