About This Manual 13
The sensor temperature is kept stable by a Peltier element to ensure
optimum image quality under all operating conditions.
AIT - ARRI Imaging Technology
ARRI imaging technology ensures the most organic, film-like image quality of
any digital camera with natural color rendition and pleasing skin tones.
Thermal concept
The camera electronics are fully sealed to protect them from dirt and
moisture. Camera heat is transported via heat pipes to a radiator which is
cooled by a fan. The fan itself is very silent, so the camera noise level is
below 20 dB (A)* - this is the same as with ARRI sync-sound film cameras. If
the fan noise level starts to increase due to fan aging, the fan can be
swapped in a matter of minutes by a trained technician.
*at 24 fps and ambient temperature < 25°C
EVF-1 electronic viewfinder
ARRI is redefining electronic viewfinders with LED lighting, high resolution
and a viewing experience that comes as close to an optical viewfinder as
possible.
Internal recording
ALEXA can internally record Quicktime movie clips with Apple ProRes
codecs to Sony SxS PRO cards. The cards deliver high data rates and are
very robust. ProRes can be natively edited in FinalCutPro, eliminating the
need to transcode. ProRes 422 (HQ) and ProRes 4444 deliver visually
lossless compressed images with a color depth of 10 bit for ProRes 422 and
12 bit for ProRes 4444.
Quicktime movie clips can be played back in the camera with output on REC
OUT, MON OUT and the electronic viewfinder.
Audio recording
Analog 2-channel audio can be recorded as 24 bit 48 kHz PCM in the
Quicktimes, as well as embedded to the HD-SDI signals.
Licensed features
By adding license keys, new camera features can be enabled that go
beyond the initial camera specification.
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