(+33) 06 15 71 54 22 / adriengo@hotmail.fr

Alexa mini

 

 

L’ALEXA MINI est la dernière des caméras Arri, mini par la taille pas par les performances. Toujours fidèles à leur réputation, les ateliers Arri ont miniaturisé leur légendaire caméra numérique, offrant à leur gamme ALEXA un model plus compact, capable de s’opérer sur un drone ou sur un gimbal. Elle offre des performances incroyables pour ce type de caméra, proposant jusqu’à 200fps et différents codecs d’enregistrement dont le ProRes 444XQ.


(Licences ARRIRAW et Anamorphique 4/3)

Livrée avec :

Caméra

  • Viseur ARRI ALEXA MINI + Arri EVF Bracket
  • Monture  PL
  • Lecteur de carte CFast
  • Support de tige de 15mm + Tige de 15mm
  • Top Handle
  • Support Arri/Bebop de Vlock Arrière
  • Base d’accroche plate pour gimbal

Energie

  • 3 Vlock + Chargeur

Média

  • 3X 128Go + 1X 256Go CFast Lexar 3600X

Avez vous besoin de batteries Vlock supplémentaires et de carte mémoire en plus?

L’ALEXA MINI bénéficie entre autres du même capteur que ses grandes sœurs de dernière génération, réputées pour un rendu des peaux incomparables.

Beaucoup d’opérateurs préfèrent tourner avec les ALEXA par rapport aux RED, notamment pour des questions de rapidité de tournage et de simplicité. L’ergonomie des caméras ARRI proposent un accès rapide aux réglages, diaph, iso, framerate…

L’ALEXA MINI a été doté d’un jeu de filtre ND gérés électroniquement, 0.6, 1.2, 2.4.

Elle est contrôlable à distance par wifi et embarque un système de contrôle des moteurs C-force en façade sans utiliser de récepteur.

Quelques spécifications techniques :

De 0.75 à 200fps
ProRes et ARRIRAW
HD, 2k, 4k UHD
Non compressés ARRIRAW 2.8k et ProRes 3.2k en interne et via la sortie SDI
Capteur Super 35 – 4/3
1 emplacement CFast Card
Boitier en carbone pour plus de légèreté.

Pour toute information complémentaire sur cette caméra exceptionnelle rendez-vous sur le site ARRI, vous pourrez y visionner également plein de footage et des vidéos explicatives.

Camera type 35 mm format film-style digital camera with lightweight and compact carbon body, switchable active sensor area, support for ARRI MVF-1 viewfinder, built-in remote control capabilities via ARRI Electronic Control System and Wi-Fi, support for cforce motors, built-in motorized ND filters, interchangeable lens mounts and ARRI Lens Data System as well as Lens Data Archive.
Dimensions Length: 185 mm/7.3″
Width: 125 mm/4.9″
Height: 140 mm/5.5″
(camera body with PL lens mount)
Weight ~ 2.3 kg/5 lbs (camera body with titanium PL lens mount)
Sensor 35 mm format ARRI ALEV III CMOS with Bayer pattern color filter array
Active photo sites
(with surround view) S16 HD: 1600 x 900 (1760 x 980)
HD: 2880 x 1620 (3168 x 1772)
2K: 2868 x 1612 (3154 x 1764)
3.2K: 3200 x 1800 (3424 x 1926)
4K UHD: 3200 x 1800 (3424 x 1926)
4:3 2.8K: 2880 x 2160 (3168 x 2160)
2.39:1 2K Ana.: 2560 x 2145 (3424 x 2202)
HD Ana.: 1920 x 2160 (3424 x 2202)
Open Gate 3.4K: 3424 x 2202 (3424 x 2202)
Shutter Electronic shutter, 5.0° to 356.0°
Exposure latitude 14+ stops over the entire sensitivity range from EI 160 to EI 3200 as measured with the ARRI Dynamic Range Test Chart (DRTC-1)
Exposure index EI 800 base sensitivity
Filters Built-in motorized ND filters 0.6, 1.2, 2.1
Lens mounts PL mount
EF mount
Recording media CFast 2.0 memory cards
Recording formats ProRes:
S16 HD: 1920 x 1080 (up-sampled from 1600 x 900)
HD: 1920 x 1080
2K Cine 16:9: 2048 x 1152
3.2K: 3200 x 1800
4K UHD: 3840 x 2160 (up-sampled from 3.2K)
4:3 2.8K: 2880 x 2160 (padded to 2944 x 2160)Anamorphic ProRes formats with 2x in-camera de-squeeze:
HD Anamorphic: 1920 x 1080*
2.39:1 2K Anamorphic: 2048 x 858MXF/ARRIRAW (in-camera recording to MXF-wrapped ARRIRAW files):
2.8K 16:9: 2880 x 1620
*
Open Gate: 3424 x 2202MXF/ARRIRAW Open Gate modes with active image area matching 4:3 ProRes modes:
4:3 2.8K (OG 3.4K): 2880 x 2160 (Recording in Open Gate 3.4K)

2.39:1 Ana. (OG 3.4K): 2560 x 2145 (Recording in Open Gate 3.4K)***
16:9 HD Ana. (OG 3.4K): 1920 x 2160 (Recording in Open Gate 3.4K)***
Recording codec ProRes 4444XQ, 4444, 422 (HQ), 422, 422(LT), MXF/ARRIRAW
Recording frame rates 16:9
ProRes HD 0.75 – 200 fps
ProRes S16 HD 0.75 – 200 fps
ProRes 2K 0.75 – 200 fps
ProRes 3.2K 0.75 – 60 fps
ProRes UHD 0.75 – 60 fps
MFX/ARRIRAW 16:9 2.8K 0.75 – 48 fps4:3
ProRes 4:3 2.8K 0.75 – 50 fps6:5*
ProRes 2:39:1 2K Ana. 0.75 – 120 fps8:9**
ProRes HD Ana. 0.75 – 120 fpsOpen Gate
MFX/ARRIRAW 3.4K Open Gate 0.75 – 30 fps* 4:3 cropped
** Center crop from anamorphic
Color output Rec 709, custom look or Log C
Look control Import of custom 3D LUT, ASC CDL parameter (slope, offset, power, saturation)
Adjustable image parameters Knee, gamma, saturation, black gamma, saturation by hue
Focus and exposure control Peaking, zebra, false color, waveform
White balance Manual and auto white balance
Sound level < 20 dB(A) at standard frame rates
Environmental ‘-20° C to +45° C (-4° F to +113° F) @ 95% humidity max, non-condensing splash and dust-proof through sealed electronics
Viewfinder Multi Viewfinder MVF-1 (OLED and LCD) with flip-out LCD screen and military-grade connector to camera Camera Control Panel (CCP-1) LCD control panel with option to daisy-chain MVF-1
Control interface Soft buttons and OSD on SDI output, integration of Transvideo Starlite HD5-ARRI touch interface WCU-4 hand-unit with control over operational parameters.
ARRI lens motor control Built-in white coded radio interface for ARRI lens and camera remote control LBUS motor output for daisy-chainable cforce lens control motors Lens Data Archive
Wi-Fi remote control Built-in Wi-Fi interface and web-based remote control from phones, tablets and laptops
Custom control Optional GPIO interface for integration with custom control interfaces
Power input Lemo 8-pin, 10.5-34 V DC
Video outputs 2x HD-SDI out 1.5G and 3G: uncompressed HD video with embedded audio and metadata, 6G SDI in UHD and 3.2K recording modes.
Inputs SDI-Genlock (optional activation through ARRI Service), Timecode (in and output)
Other interfaces USB 2.0 (for user sets, looks etc.)
Ethernet for service and web remote control
EXT accessory interface w. RS pin and unregulated power output (outputs battery voltage)

NOTE:

Alexa mini features 05

Alexa mini features 04

Alexa mini features 03

Alexa mini features 02

Alexa mini features 01

Alexa mini features

 

 

 

DEBAYERISATION

The sensor in the ALEXA is covered with a mosaic RGB filter pattern, called the Bayer pattern. When an exposed frame is sampled by the sensor, it is captured as a one-channel image (as opposed to a regular RGB three-channel color image). The reconstruction of the missing color components for each pixel, based on the type and position on the Bayer pattern is called de-bayering.

With a Bayer pattern sensor, 50% of the sensors photosites are used to represent green, 25% of the photosites represent red and the remaining 25% represent blue.

 

The different ARRI De-Bayer Algorithms (ADA) control how the color channels are reconstructed.

  • ADA-5 HW is the lastest de-bayer algorithm used in the ALEXA cameras starting with SUP 11.0. It offers improvements for bluescreen vfx shoots and reduces noise as well as aliasing.
  • ADA-5 SW is an enhanced software de-bayering algorithm based on ADA-5 HW
  • ADA-3 HW is the camera hardware de-bayer algorithm used in ALEXA cameras in SUP 7.0 up to SUP 10.0.
  • ADA-3 SW is an enhanced software de-bayering algorithm based on ADA-3 HW. Depending on the scene content, it can deliver more image detail than ADA-3 HW.
  • ADA-2 SW is a legacy software de-bayer algorithm.
  • ADA-1 HW is a legacy camera hardware de-bayer algorithm, that was used before SUP 7.0.

The processing version controls which color transformations are applied to the de-bayered data. Version 5.0 represents the latest status of in-camera color processing. Previous versions are available to allow matching an output with previously processed footage. ADA-3 HW/SW is only available in combination with processing version 4.0.