So here’s an interesting one.
I had a chance while shooting some tests recently of the new Olympus firmware upgrade to the Olympus E-M5 Mark II to shoot some tests in a studio under controlled conditions.
I set up a 3200K balanced lighting setup and then also able to shoot the Ursa Mini 4.6K in RAW and then shot the same again with Arri RAW on an Alexa XT.
This was shot using Cooke S4’s and both cameras were exposed for ISO 800.
I designed this scenario to show some contrast and I’ve also added a brightness ramp on the back wall. You can work out how many stops over and under from the Fc readings here.
I think the UM4.6K stacks up very well against an Alexa shooting RAW, but I’d love to hear if you think it does.
The only thing I’ve noticed now that I’ve had some time with these files is that there appears to be a small amount of IR contamination in the blacks around Maddy’s shirt and the fabric on the table on the UM4.6K. This can be easily corrected but it’s unexpected.
I used a mitomo True ND6 here and these filters have been very reliable for me on other cameras. I have to admit a lot of the other shooting I’ve been doing for Blackmagic I’ve been using the firecrest ND’s and haven’t seen this problem before. It may well be that the TRUE NDs are letting in some IR that the UM4.6K is seeing, but I’d have to test further for that and haven’t had a chance to.
In any case please do enjoy these camera original files hosted by my friends at Digital Pigeon. I’d love any feedback too if you’re finding the files fast to download or not.
Here are the Blackmagic shots.
And then the Arri Alexa RAW
Arri Alexa RAW open gate Cooke S4 32mm
Arri Alexa RAW open gate Cooke S4 75mm