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124 Operation of the Camera
NOTICE
Recording ARRIRAW internally works only with SXR/XR Capture Drives.
ProRes
Recording in ProRes 2K is a cost-efficient alternative to shooting ARRIRAW, as it
requires less storage space and no processing, but at the same time delivers an
image quality that is superior to that of up-scaled HD material.
With the option to capture ProRes 2K in the 4:3 aspect ratio, the format offers true
anamorphic capture with regular 2x anamorphic lenses and offers extra room for
repositioning when using standard spherical lenses.
ALEXA ProRes 3.2K allows the same easy up-sampling in post to 4K UHD
deliverables as Open Gate ARRIRAW does to 4K Cine. These formats, combined with
ALEXA's unsurpassed overall image quality, make ALEXA SXT cameras suitable for
any type of production with any distribution requirements.
The following resolutions are available with ProRes recording:
Sensor Mode Resolution
HD (1920 x 1080)
2K (2048 x 1152)
3.2K (3200 x 1800)
16:9
4K UHD (3840 x 2160)
2K Anamorphic (2048 x 858)6:5
4K Cine Anamorphic (4096 x 1716)
4:3 2.8K (2880 x 2160)
3.4K (3424 x 2202)Open Gate
4K Cine (4096 x 2636)
ProRes RAID - Redundant Recording on XR and SXR Capture Drives
In ALEXA SXT cameras, ProRes is always recorded with a method (RAID) that
provides redundancy for greater data security for both XR and SXR Capture Drives.
As with ALEXA XT cameras, half the Capture Drive's capacity can be used to record
ProRes, but with the SXT, the other half can be used to increase the safety of the
recorded data.
ProRes RAID for XR Capture Drives
When XR Capture Drives are being formatted for ProRes in the ALEXA SXT, they
are being formatted as a RAID 1 (mirrored) volume. XR Capture Drives contain two
internal SSD drives, and with RAID 1 the same ProRes data is written to each of those
two drives.
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