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Main Parameters
When changing the exposure index, short temporary artifacts may appear on the image outputs
resulting from the change.
When changing the EI setting during recording, one or more frames on the recorded material may
show artifacts resulting from the change.
14.5
ND Filter
The ALEXA Mini LF has a built-in motorized and sealed filter stage for Full Spectrum Neutral Density
filters (FSND) with densities of 0.6, 1.2 and 1.8 (and an optical clear filter). In comparison to IRND
filters, which have an uneven spectral behavior, or to an ordinary ND filter, which opens up at about 675
nm, the FSND filters offer a true, even light attenuation over the whole spectrum. This prevents artifacts
from infrared wavelengths and the need for additional IR filters.
► Select HOME > ND to set the ND filter.
User Buttons ND Increase / Decrease support to quickly change the ND filter.
14.6
White Balance
White Balance (WB) is the color balance of the camera that should be matched to the color temperature
of the light in use. White balance is a red-blue adjustment of the image. To adjust the green-magenta
balance, use the color compensation (CC) adjustment. For example, a fluorescent source will have
peaks in its spectrum that cannot be corrected with red-blue white balance alone. The CC shift can
correct these peaks up to a full green or full magenta gel. One step of CC shift is equal to 035 Kodak
CC values or 1/8 Rosco values.
► Select HOME > WB to set the white balance.
► Select a preset from the list or
User Buttons WB Increase / Decrease support to quickly change between white balance pre-
sets.
Automatic white balance calculates the white balance based on the camera's live image and overwrites
the active white balance value. The result is stored as the first entry in the WB list.
► Select HOME > WB and press Auto WB.
The monitoring outputs display an overlay indicating the area used for white balance calculation.
► Press the Auto WB button again within one second to execute automatic white balance.
The calculated white balance is set and stored as the first entry in the white balance list.
Info: Under- or overexposed images may cause the automatic white balance to fail. Always trigger
automatic white balance with properly exposed images.
User Button Auto WB supports to quickly execute an auto white balance.
14.7
Timecode
Timecode ensures that each frame of recorded material can be identified with a unique value and
synchronized with the appropriate media, such as audio or the second camera in a multicamera
application. In conjunction with other metadata, such as reel names, all recorded media retains its
unique identity.
ADVICE
add
a custom white balance.
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