Licensed Features - ARRI ALEXA Series User Manual

216 ALEXA M
Frame rate
The maximum sensor frame rate in 4:3 is 48 fps.
4:3 and Highspeed Mode
It is possible to switch from 4:3 to High Speed mode and vice versa. If
recording is set to ProRes, only the 16:9 center area of the image sensor
is read out. If recording is set to ARRIRAW (only available for ALEXAs
with XR module), 4:3 High Speed is available.
Recording
Internal recording is only possible with ProRes codecs in 2K
(2048x1536) resolution, and ARRIRAW on ALEXAs with XR module.
External recording is only possible in ARRIRAW on ALEXAs with SxS
module (except ALEXA HD and ALEXA HD Plus) and with recorders that
support ARRIRAW 4:3.
Monitoring
For monitoring, the 4:3 image is downscaled to 960 x 720 pixels for the
EVF and 1440 x 1080 for the MON OUT. Only horizontal surround view
is available in 4:3 mode. The image is not rescaled for surround view,
but horizontally extended. The non-active area of the EVF and MON
OUT is filled with black ("pillarboxed").
Anamorphic desqueeze
For the electronic viewfinder EVF-1 and the MON OUT both 1.3x and 2x
anamorphic desqueeze is available in 4:3 mode. 1.3x anamorphic
desqueeze results in an image size of 1280 x 720 for the EVF and 1920 x
1080 for the MON OUT, while 2x desqueeze results in an image size of
1280 x 480 for the EVF and 1920 x 720 for the MON OUT.
For the optical viewfinder (ALEXA Studio and ALEXA XT Studio only) ,
anamorphic desqueeze can be achieved by flipping an anamorphic
element into the optical path. By default, the OVF has an optical
element for 2x desqueeze. An optical element for 1.3x desqueeze is also
available.

16.6 Licensed Features

Licensed features High Speed recording and Anamorphic desqueeze
are automatically enabled in the ALEXA M.