Information about the CML Camera Evaluations 2018

These evaluations were carried out by Geoff Boyle in early July 2018 at the University of the West of England (UWE)

Coordination was by David Neal of UWE and I was assisted by Sergejs Bozokz and a group of UWE students. Jose del C Martine joined us from the US.

All cameras were tested using Zeiss Supreme Prime Lenses, 50mm for S35 & 75mm for FF

The cameras, where appropriate, were set to whatever resolution came closest to a "standard" S35 or Full Frame image.

Lighting was Blonde's and ARRI 2Kw fresnel's for the Tungsten tests and ARRI Sky Panels for the daylight, in tungsten light the manufacturers preset for 3200 was used in the daylight tests cameras were auto-balanced.

The reference charts were courtesy of DSClabsand also ones purchased by CML.

The Cameras were exposed in half stop intervals from T1.5 with a 180 degree shutter to T22 with a 22.5 degree shutter. All cameras were set to the manufacturers recommended EI. Light level was 400 foot candles.

The only objective here is to establish the true ISO of any camera and to find a precise usable dynamic range. I emphasise usable as although more may be measurable it may be too noisy to use or the colour may change too much.

EXR 16bit files in ACES AP0 are here with original camera rushes here the EXR's are large files, the original camera files are huge you have been warned :-)

There are h264 files available on YouTube and Vimeo. The Quicktime files that the Vimeo files were created from are also available for download from Vimeo.

The EXR's were created in the manufacturers own software wherever possible, where there is no maufacturers software BMD Resolve was used.

The files for YouTube & Vimeo were created in ACES space in BMD Resolve with the only adjustments being the application of the rlevant IDT's and ODT's. Exposures were matched using offset only to 488 in a 10 bit environment using the Kodak Grey Scale Plus as the reference.

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