Rotolight AEOS User Manual page 22

('F-DIM') TRUE APERTURE DIMMING ™
FDIM
(Shows the brightness setting as an accurately
calculated aperture (F-Stop) for your subject at a
given distance).
Cycle the menu to 'F-DIM' then click the right switch
to enter 'F-DIM' mode.
Rotating the left knob cycles through the available
user parameters:
'ISO' (your camera ISO setting), 'EXP' (your camera
shutter speed) and 'FEET' (the distance from the
light to your subject in feet).
Rotating the right knob will adjust the selected
user parameter (ISO/EXP/FEET).
Clicking the right switch will enter the 'F-Stop
Dimming Display' where the brightness is
dynamically displayed as an aperture or 'F-Stop
(True Aperture Dimming continued).
Adjust the brightness with the right knob and the
display will show the adjusted F-Stop aperture for
your camera.
(Please note the 'True Aperture Dimming™'
algorithm calculates the F-Stop based on the
AEOS Brightness setting, your camera's ISO and
shutter speed, the distance to the subject AND
compensates for the skin contrast of the subject)
To re-adjust the last selected parameter (usually
FEET) click the right switch, make the adjustment,
then click the right switch again to return to the
'F-Stop Dimming Display', alternatively rotate the
left knob to select a different parameter to edit,
and then click the right switch to re-enter 'F-Stop
Dimming Display'.
This enables you to effectively 'bookmark' the user
parameter that is dynamically changing during your
shoot (i.e. distance to subject), and without needing
to re-meter the shot, update the parameter and
calculate the revised F-STOP, allowing you to work
fast.
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