ARRI has made a Beta version available of ALEXA Mini LF SUP 7.1 for customers to download. SUP 7.1 features a new 2.8K LF 1:1 anamorphic recording mode.
2.8K is available in ARRIRAW and Apple ProRes and is tailor-made for shooting with 2x anamorphic lenses for a target deliverable of 2:1, fulfilling 4K UHD mandates.
Please visit the ALEXA Mini LF SUP 7.1 Beta download page to register for the Beta test and to find the Release Notes for all technical information.
ALEXA Mini LF SUP 7.1 Features Overview
- 2.8K LF 1:1 – 2.8K recording format - available in ARRIRAW and Apple ProRes
- Lens Data Archive files for ARRI Signature Primes and ARRI Signature Zooms- ARRI Signature Prime 12 mm and 280 mm, ARRI Signature Zoom 45-35 mm and 65-300 mm
- Sync Shift via Camera Access Protocol
- Various bug fixes and system stability improvements
New Large Format Recording Format
ALEXA Mini LF SUP 7.1 Beta includes the new 2.8K LF 1:1. This format is designed for shooting with anamorphic S35 or large format 2x lenses for a target deliverable of 2:1. By using a sensor area of 2880 x 2880 photosites, a pixel count equivalent to 4K UHD is achieved, which makes this format usable for productions that require a 4K UHD resolution. This recording format is named ‘LF’ as its height (2880 photosites) exceeds the height of an ALEXA S35 sensor (2202 photosites). However, it is covered by many S35
anamorphic lenses like, for example, the ARRI Master Anamorphic lenses.
MXF/ARRIRAW 2.8K LF 1:1 – 2.8K
Maximum frame rate: 60 fps. Sensor area: 2880 x 2880, recorded file resolution: 2880 x 2880.
MXF/Apple ProRes 2.8K LF 1:1 – 2.8K
Maximum frame rate: 60 fps. Sensor photo-sites used: 2880 x 2880, recorded file resolution: 3072 x 3024. Note: The recorded ProRes clip has black borders (3072 x 3024 pixels) around the image content (2880 x 2880) which are stated in the clip metadata and therefore cropped in most post-production tools.
Lens Files for ARRI Signature Primes & Signature Zooms
The following lens files were added in ALEXA Mini LF SUP 7.1 Beta:
• ARRI Signature Prime 12 mm
• ARRI Signature Prime 280 mm
• ARRI Signature Zoom 45 – 135 mm
• ARRI Signature Zoom 65 – 300
Although these lenses have LDS-2 built-in and do not necessarily require lens files to be present in the camera, the files are included in case of malfunction of the lens or lens mount.
Sync Shift via Camera Access Protocol (CAP)
The Sync Shift option can now also be used through the Camera Access Protocol. The Sync Shift option applies an offset to the genlock signal at the input. The minimum step size is 52 ns, maximum possible correction is up to +/- 20 ms (=384000 steps), depending on the sensor frame rate.
Please note that this is a BETA version of ALEXA Mini LF SUP 7.1. It is meant to be used for testing and evaluation purposes only, not for productions.