compares the Arri Alexa XT with the Sony F55 and the Sony F3:
Arri Alexa XT vs. Sony PMW-F55 vs. Sony PMW-F3 camera test shot with Leica Summicron-C lenses
Arri Alexa recorded to Arriraw 2,8K
Sony F55 recorded to Sony RAW 4K Slog3
Sony F3 recorded to Sounddevices PIX240 Prores 4444 1080p
Setup conditions were 100% the same for all cameras. Overexposed frost frame was put there for a purpose to see how each camera handles highlights and partially compare the dynamic range in between. All cameras has been set for correct exposure based upon skin tones and later on material was post corrected in post.
POST PRODUCTION NOTES
Arri Alexa and Sony F55 camera material has been adjusted for correct exposure (in case of over/under exposure) and stock LUT applied. In case of Alexa – LogC to Rec709, in Sony case – Slog3 to Lc709 TypeA. In all situations Alexa and F55 DOES NOT have any color correction / compensation. We did not try to match the cameras in any way so they would look identical, instead we only corrected under/over exposure and put a stock LUT on top.
Sony F3 comes with original Slog, there is not official lut available, it was graded by hand. Sony F3 had caught a blue flare on ND filter in some parts of the image, it was post corrected to minimize the issue. Not sure if blue flare was the reason, but F3 red colors were off the hue, so reds were corrected additionally.
Naturally, Sony F3 is an old camera and does not really stand a chance with it’s Prores recording, so we included it just for the sake of interest and did not include in all visual comparison tests.
As you will see, there is a quite visible Arri Alexa saturation change in the image when going from EV0 to the extremes. That is because Alexa is doing this post procesing inside the camera. Once again – there was no color adjustment in post production.
Sony F55 is cleaner when underexposed.
Interesting thing – most accurate red pants and waving red material’s color rended by F55. Alexa’s red hue was a tad towards magenta.
As for which camera is better – you be your own judge. F55 set cost 30k Euro, Arri Alexa – 90k Euro.
What was surprising, that Sony F3 held up pretty nice when exposed properly, though of course, it has smaller dynamic range compared to Alexa or Sony F55.
Everyone, feel free to tell your honest opinion! And of course, for better quality, download the video file!