Should I shoot 8 bit UHD or 10 bit HD?

By alisterchapman

This comes up so many times, probably because the answer is rarely clear cut.

First lets look at exactly what the difference between an 8 bit and a 10 bit recording is.
Both will have the same dynamic range. Both will have the same contrast. Both will have the same color range. One does not necessarily have more color or contrast than the other. The only thing you can be sure of is the difference in the number of code values. An 8 bit video recording has a maximum of 235 code values per channel giving 13 million possible tonal values. 10 bit recording has up to 970 code values per channel giving up to 912 million tonal values.
There is a lot of talk of 8 bit recordings resulting in banding because there are only 235 luma shades. This is a bit of a half truth. It is true that if you have a monochrome image there would only be 235 steps. But we are normally making colour images so we are typically dealing with 13 million tonal values, not simply 235 luma shades. In addition it is worth remembering that the bulk of our current video distribution and display technologies are 8 bit – 8 bit H264, 8 bit screens etc. There are more and more 10 bit codecs coming along as well as more 10 bit screens, but the vast majority are still 8 bit.
Compression artefacts cause far more banding problems than too few steps in the recording codec. Most codecs use some form of noise reduction to help reduce the amount of data that needs to be encoded and this can result in banding. Many → continue…


Panasonic has announced the addition of the AK-UC4000

By Cary Welch

NEWARK, NJ (February 20, 2018) – Panasonic has announced the addition of the AK-UC4000 studio camera to its system camera line, joining the current AK-UC3000 4K HDR capable-camera and the AK-HC5000 1080p 4x high-speed HDR capable-system. It brings together the features of both and raises the bar for 4K HDR performance and future-proof infrastructure.

The current UC3000 utilizes Large Single Sensor Internal Expansion Lens (LSSIEL) optics to expand the standard image from broadcast 2/3” B-4 mount lenses to a 1” cine-style 4K sensor, enabling cinema camera performance with broadcast optical behavior and lenses. The UC4000 utilizes LSSIEL optics with Panasonic’s new, larger, advanced super 35mm imager, capturing 4.4K native resolution improving the UHD resolution (more than 2000 TV lines, both horizontal and vertical), dynamic range and S/N ratio (62dB) over the UC3000. It maintains the same broadcast lens compatibility and operation and keeps the same camera form factor–matching or surpassing the best performing 4K HDR B-4 mount cameras on the market.

The UC4000 is designed for live sports production and high-end event broadcasts, with potential customers including pro sports broadcasters and production rental companies, stadium and venue owners (pro sports teams) and collegiate sports video departments, as well as broadcast studios and call letter TV stations, houses of worship, high-end corporate video departments and eGaming broadcasters.

“The oversampling of the UC4000’s new 4.4K imager helps sports production crews avoid potential moiré issues caused by the ubiquitous LED screens,” said Michael Bergeron, Studio/Systems Cameras Product Manager, Panasonic Media and Entertainment Company. “Also, the future 12G 4K output feature will enhance the capability of an integrated stadium wireless system–like the system Panasonic has developed with Wave Central–so even wireless cameras can feed 4K to the high-resolution scoreboards.”

Future Proof Systematization with New AK-UCU600 Camera Control Unit

The new AK-UCU600 camera control unit provides → continue…

From:: Student Filmmakers

Canon EOS M50 first impressions review


The Canon EOS M50 is an entry-level mirrorless camera sporting an electronic viewfinder, fully articulating touchscreen, single control dial and 24MP APS-C sensor – the same used by its M-series siblings. It has Canon’s latest DIGIC 8 processor and offers expanded Dual Pixel AF coverage, 4K/24p video capture (1.6x crop) as well as Wi-Fi, Bluetooth and NFC.

In a lot of ways it’s a beefier, viewfinder-sporting M100, the brand’s most affordable M-mount offering. And it will likely appeal to the same crowd: beginners and/or those stepping up from a smartphone as their primary photography device. Unlike the M100, the M50 has Canon’s Guide Modes, like those found on the SL2 and T7i. But what’s really exciting about the M50 is that it’s an indicator of what’s down the road for the rest of the M and Rebel series.

Key Features:

  • 24MP APS-C CMOS sensor
  • Dual Pixel autofocus for stills and video
  • DIGIC 8 processor
  • 2.36M-dot OLED EVF
  • 1.04M-dot vari-angle LCD
  • 7.4 fps burst in AF-C (10 fps in AF-S)
  • 4K/24p UHD video (1.6 x crop)
  • 1080/60p and 720/120p HD video
  • Wi-Fi and NFC with Bluetooth
  • 235 shot-per-charge battery live (via CIPA)

One year ago, we met with Canon executives in Yokohama, Japan – you can read the full interview here. At the time, they promised the brand’s main strategic focus going forward would be connectivity and video. The M50 is a clear indication that Canon is making good on that promise. This is the first Canon camera that will automatically send photos to your smartphone after each shot and the first M-series to offer 4K. But before you get too excited about that latter bit, it’s worth noting that 4K comes with a heavy 1.6x crop, and Dual Pixel AF is not available in → continue…

From:: DPreview

Canon announces EOS M50 with 24MP sensor, 4K video and built-in EVF

Canon is taking the wraps off the EOS M50, a beginner-friendly mirrorless camera that’s the first in the company’s M-series to offer 4K video capture. It uses a 24MP APS-C sensor with Dual Pixel autofocus, a new Digic 8 processor and unlike its M100 sibling, provides a built-in electronic viewfinder.

Read our Canon EOS M50
First Impressions

The M50 is also the first camera to offer a new CR3 Raw format. It provides a standard “image quality priority” Raw setting as well as a “size priority” C-Raw that produces up to 50% smaller files with the same resolution, albeit with a slight drop in image quality.

Wi-Fi, NFC and Bluetooth are also included, enabling a new option to automatically transfer images from the camera to a smartphone after each shot. The M50’s updated processor makes 1080/120p high frame rate video possible, and UHD 4K recording is available at 24p. Unfortunately, 4K also imposes a significant 1.6x crop and Dual Pixel isn’t available.

The camera’s 2.36 million-dot OLED EVF complements a 1.04 million-dot fully articulated touchscreen. With focus locked the M50 will shoot up to 10 fps; 7.4fps shooting is available in C-AF.

Dual Pixel autofocus provides improved coverage with certain lenses, including the EF-M 55-200mm, EF-M 18-150mm and EF-M 28mm F3.5. With one of these lenses attached, the M50 gives 88% horizontal and 100% vertical sensor coverage and up to 143 AF points. A large number of EF and EF-S lenses will also give the same level of AF coverage, while other M-mount and EF/EF-S lenses will offer up to 99 AF points and 80% horizontal/80% vertical coverage.

The Canon EOS M50 will be available in April for $780 body-only. It will also be bundled with an EF-M 15-45mm F3.5-6.3 IS STM for → continue…

From:: DPreview