The first step in HDR is to recognize you have a HDR scene. Look for a good range of contrast across the brightest and darkest parts of your image and also across the color and tonal range as each color also contains its own brightness or luminance information.
Secondly ensure you are sending a Log signal into the SHOGUN CONNECT so that you are recording the HDR Log information. For more information refer to the Log/HDR section.
Now you are ready to capture Log and simultaneously use ATOMOS 10 image processing to preview the final HDR result in the field, rather than dealing with the washed out look of Log for critical exposure decisions.
The main impact of HDR is apparent in the specular highlights and bright areas. The areas that would have previously been ‘blown out’ will now contain visible detail and information to enhance your content. HDR provides more headroom allowing you to show more detail. Experimentation with increased exposures is encouraged.
ATOMOS 10 HDR uses an in depth understanding of each Log curve and combines it with the control of the panel processing and backlight in order to apply an increased brightness to the highlight areas of the scene.
Alongside the physical light in the scene, the faster your lens the greater the level of brightness you’ll have to play with. Choosing a Cine-style lens or those with a de-clicked manual aperture can provide increased flexibility over photo lenses that use an electronic control aperture.
The AtomOS 10 monitoring mode allows the processing engine of the SHOGUN CONNECT to display the High Dynamic Range capabilities of a Log gamma input. HDR monitoring in ATOMOS 10 is the result of the research and development by ATOMOS that allows control of all aspects of the monitor through image processing to deliver the unclipped beauty of specular highlights through natural, vibrant colors with a result that allows you to simply shoot what you see. When the scene in front of you and the picture displayed on the SHOGUN CONNECT look similar, your exposure should be correct but use in conjunction with the waveform monitor to verify.
One of the key elements to understand is that if your camera can shoot in Log then it can already capture more dynamic range than you can display in SDR. Log preserves the highlight information by applying a Logarithmic curve to compress the additional stops of dynamic range to fit in to the Rec.709 standard. The image appears washed out and desaturated as each pixel contains more brightness information than SDR can display, if it were to do this it would be brighter than 100% Rec709 and so be clipped. This is illustrated below: