ARRI K2.47050.0, Инструкция по эксплуатации

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Note: Iris data is only available in mode IRIS VALUE BY USER as described
in the next chapter.
Move the cursor by using the keys
Ê
and
Ë
to the line – IRIS
→
Photo . Pressing the key
Í
will increase the iris value by one f-stop.
Pressing the key Ì will decrease the iris value by one f-stop.
Iris Value will switch automatically between LDS and USER, depending on
which type of lens is used. If Lens Data Lenses are used, the iris value will
be passed onto the HD-IVS automatically. No manual input is necessary. If
lenses without the LDS system are used, the setting IRIS VALUE BY will be
on USER. In this case it is possible that the operator reads the iris data
from the lens and enters the value manually. No manual access is possible
if lens data lenses are used.
5.10.3
GGC Mode
The visibility of the ground glass texture depends on the f-stop of the film
camera lens. It is more visible if the lens is stopped down. In order to
allow a choice between best results and easy operation, the HD-IVS offers
two different modes for GGC.
Advanced mode
In the advanced mode a series of three calibration images is recorded on
different f-stops (2.8, 8 and 16). In this operation mode, the HD-IVS
switches between those three calibration images if the iris is changed. In
between the calibration images, the software will calculate the missing
f-stops. For example, based on a calibration image on T 8, the software
can calculate the T 5.6 and the T 11 image with good results. Thus the CCG
works well over the entire iris range.
In live mode, it makes a difference whether Lens Data Lenses are used or
not. If Lens Data Lenses are used, the information on the iris is
automatically transferred to the HD-IVS and used for the necessary
calculation. No manual action is needed. If no LDS lenses are used, the
user can read the T-Stop from the lens and enter it manually into the HD-
IVS to get the best possible GGC result.