Autor: Redaktion

Arri Amira

The Arri Amira has been expanding the portfolio of the Arri camera series since 2013.

The Arri Amira is designed for one-man operation in the production of documentaries, non-fiction formats, high-quality TV magazine programmes, small stage productions or live events. It uses the same sensor as the Alexa and can produce high quality images. It features 14 stops exposure range and exposure index settings of EI160 up to EI3200.

The Exposure Index (EI) is not specified for film light sensitivities, but a portion of the available f-stops are above and below 18% grey. Irrespective of the value, the Amira has about 14 stops. An EI of 200 delivers about 5.5 stops above and 8.9 stops below 18% grey, while an EI of 3200 delivers 9.7 stops above and 4.8 stops below 18% grey. Exposure measurements can be performed with the False Color check. 

False Color can be used in the viewfinder or on the monitor out port to measure the signal corresponding to the set gammas (Rec 709 or LOG-C ). Red and violet give white and black clipping, green gives the level of 18% grey and pink is an ideal measure of the exposure of skin tones.

The Amira is sold in 3 models. The standard Amira offers HD (1920x1080) recording in Apple ProRes422 and up to 100fps. Only Rec709 is available for this model.

The Amira Advanced provides recording in ProRes422HQ to 200fps, in LOG-C. In addition, externally created Looks can be imported. In-Camera Grading, a WiFi remote control and a pre-roll function are other useful features.

The Amira Premium adds the functionality to record 2K (2048x1152) in Prores4444 and the ability to import self-generated 3D LUTs .

All three models can be expanded via a separate license to allow for 4K UHD recording (3840x2160). The 4K recording is limited to 60fps.

Depending on the model, Rec709 and LOG-C are the two available colour mode options.

Rec709 is a display-specific signal and corresponds to the HD standard. It can be immediately viewed and processed in any HD workflow without a Look Up Table (LUT).

LOGC is a logarithmic encoding and does not denote a colour space, but a set of curves, which is based on the characteristics of a film negative. LUTs can take the required "tone mapping" to represent a LOGC acquired image correctly. LOGC is ideal for recording image information and offers colourists a large amount of freedom in colour correction. Ideally LOGC should be used when Prores 4444 is available to capture the full potential.

The Amira features a Cinema Cameras PL mount, and also supports B4 or EF-mount lenses, allowing an enormous range of compatible lenses. There are adapters from PL to B4 or PL to EF, but these adapters generate a loss of light. These Lens Mounts can be changed in less than one minute. The camera has internal ND filters of the following densities: ND0.6, ND1.2 and ND2.1.

The Amira is becoming popular with news reporters and documentary film makers as the camera turns on and is ready to record in 13 seconds.

The Amira records onto CFast 2.0 cards. The cards allow transfer rates of 400-600Mbits/s, making them perform well enough to cope with recording in 4K or high-speed data rates shots. Older generation CF or CFast cards are not compatible.

SanDisk Extreme Pro cards (60, 120, 128GB) and Lexar Professional 3600X cards (128, 256GB) have been tested and verified for compatibility with the Amira.

Be aware that the available capacity of the memory cards may differ from the size quoted in the camera display, as the camera always has about 5% of card memory reserved at all times to ensure optimal performance of the memory.

Amira Specifications

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