![]() ![]() Log does this by applying a logarithmic curve to the video, which can then be selectively expanded again in post. Both are ways to record the linear dynamic range that the camera ‘sees’ into a video colorspace. It’s important to keep in mind that neither raw nor log is a panacea for all image issues. Of course, HDR will continue to be a moving target until one of the various competing standards gains sufficient traction in the consumer market. Remember that HDR video is completely different from HDR photography, which can often be translated into very hyper-real photos. This lets a colorist stretch the highlight information up to the peak luminance levels that HDR displays are capable of. That’s by recording the image as either camera raw or with a log color profile. Nearly every modern professional camera can shoot footage that can easily be graded into HDR imagery. HDR is the ‘next big thing’ after resolution. There are tons of 4K options and the only decision you need to make when shooting and editing is whether to record at 3840 or 4096 wide when working in a 4K mode. Resolution is largely a non-issue for most camera owners these days. ![]() Yes, there are anamorphic lens artifacts, but that’s part of the charm as to why creatives love to shoot that way in the first place. ![]() Trust me, this image looks great on a 4K display with plenty of room to crop left and right. Ironically, if you shoot with an Alexa in its 4:3 mode (2880 x 2160) using anamorphic lenses (2:1 aspect squeeze), the expanded image results in a 5760 x 2160 (6K) frame. The bottom line is that when a company like Netflix won’t accept an ARRI Alexa as a valid 4K camera for its original content guidelines – in spite of the number of blockbuster feature films captured using Alexas – you have to take it with a grain of salt. The reasons include cheap plastic lenses and high compression levels. For example, nearly all early and/or cheap drone and ‘action’ cameras appear substandard when you actually look at the image closely. In addition, not all 4K cameras look good when you analyze the image at 100%. This is made even more complicated by the design of a Bayer-pattern sensor that is used in most professional video cameras. The hitch is that there is no 1:1 correlation between a sensor’s photosites and display pixels on a screen. The second point to mention is that camera sensors are built with photosites that only loosely equate to pixels. The point at which you can no longer discern between the lines is the limit of the measurable resolution. A resolution chart uses converging lines. Resolution is commonly expressed as the horizontal dimension, but in fact, actual visual resolution is intended to be measured vertically. That’s because the terminology is based on displays and not on camera sensors and lenses.ĤK is pretty common, 8K products are here, and 16K may be around the corner. Unfortunately that’s also where the misinformation starts. HDR (high dynamic range) imagery and higher display resolutions start with the camera. ![]()
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