Interestingly enough the physical sensor size of the URSA Mini Pro 12K is identical to that of the RED Komodo.
The image circle of a lens required to shoot 12K DCI needs to be 30.56mm or larger. The physical sensor size is 27.03 x 14.25mm. This is exactly the case with the Sony F35 and Panavision Genesis (although they use a stripped RGB sensor and not an RGB CMOS sensor).Īs far as I know, this was the first commercially available RGB CMOS sensor that was capable of 4K and greater resolutions. In theory, by having an equal amount of red, green, and blue pixels you should be able to get better color accuracy and better results when shooting in mixed lighting conditions. Whether you choose to shoot in 12K, 8K, or 4K, you will get the same field of view. The result of this is there is no cropping as you change resolution. As it features equal amounts of red, green, and blue pixels it is symmetrical and this is what allows you to choose various resolutions all while maintaining the full S35 frame size. This is an RGB CMOS proprietary sensor design that features equal numbers of red, green, and blue pixels. The sensor is not a traditional Bayer pattern CMOS sensor that we see in almost every camera. If you are interested you can view the patent application that was applied for by Blackmagic in December 2018. Adding a decent OLPF with color science filter and then the R&D costs associated with tuning that sensor would have added significant cost to the price of the URSA Mini Pro 12K.Īplicant:BlackmagicDesignPtyLtd,Port Melbourne(AU) Download The ones used in ARRI Alexas are not cheap. Why didn’t Blackmagic use OLPFs before? Well, OLPFs are expensive. The original IR absorption filter on a lot of the other Blackmagic cameras, including the URSA Mini Pro 4.6K and the original URSA Mini Pro 12K don’t have an OLPF.Ĭompanies such as RAWLITE make OLPF for a lot of the Blackmagic cameras.
To prevent these issues from occurring most digital cinema cameras (including the ARRI Alexa) have a built-in Optical Low Pass Filter (OLPF).
It was a little perplexing as to why Blackmagic didn’t previously include OLPFs in its cameras.Īliasing and moiré are common issues with digital image capture. Having no low pass filter is why you didn’t see Blackmagic cameras being used for a lot of high-end work such as features. Blackmagic didn’t previously make low pass filters, although there were third-party companies who do make them. The original URSA Mini 12K sensor didn’t have any type of low pass filter so you did end up seeing color aliasing.
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