RED Helium: 8K sensor by RED Digital Cinema featuring 16.5 stops of dynamic range, native ISO 800, and rolling shutter architecture. Integrated in Epic-W, Weapon, and Raven cameras since 2016.
Technical Details
The Helium sensor captures 16.5 stops of dynamic range and achieves a base ISO of 800 (REDcolor4) with usable values between ISO 200 and 3200. The pixel size is 3.65 micrometers, and the sensor uses a rolling shutter architecture. Recording is done in RED's proprietary R3D codec with compression ratios between 2:1 and 22:1. The sensor supports various resolution modes: 8K Full Format, 7K 6:5, 6K 2.4:1, 5K 2:1, as well as 4K and 2K modes with correspondingly higher frame rates up to 300 fps in 2K. The readout speed is 0.017 seconds in 8K mode.
History & Development
RED introduced the Helium sensor in 2016 as the successor to the Dragon sensor, first implemented in the Epic-W and Weapon Helium. The development aimed for true 8K resolution without pixel binning, whereas the predecessor Dragon only captured 6K natively. In 2017, it was integrated into the more compact Raven, and in 2019 into the modular Gemini. The Helium marked RED's transition to the second 8K generation and established the company as a pioneer in the professional 8K field, before the Monstro sensor with VistaVision format followed in 2018.
Practical Use in Film
Helium cameras were used in productions such as "The Meg" (2018), "Aquaman" (2018), and the Netflix series "Lost in Space" (2018-2021). The sensor is particularly suitable for VFX-heavy productions, as the 8K resolution enables extensive post-production workflows – from digital zoom to stabilization without loss of quality. However, the high resolution requires corresponding storage capacities: one minute of 8K footage at 6:1 compression requires approximately 7 GB. Typical workflows often utilize 6K or 4K modes for standard shots and 8K for special sequences.
Comparison & Alternatives
Compared to its predecessor Dragon, Helium offers 33% more resolution and improved low-light performance. In comparison to Sony's Venice or ARRI's Alexa LF, the Helium leads in resolution but does not match their sensor size or noise behavior. As a successor, the Raptor sensor was established in 2020 with improved rolling shutter performance. Helium cameras remain relevant for productions requiring high resolution in Super35 format, while larger sensors like Monstro are preferred for full-frame aesthetics.