![]() By executing Noise reduction in camera you can fool a ima test. Not only is the DR very good on such a camera also the color response is pretty linear, which means that if you would underexpose by a few stops, you can push back the image to normal without strange color shifts or color artefacts, ofc the more you underexpose the more noise you will get because the more you get to the limits of a sensor and the resolution of the adc the higher the standard deviation and the more noise that will occur, once we get in the adc noise which is basically dark current not part of the visual image, we might be able to retrieve some sort of visual information (overspill), but we are basically bottlenecking. The arri Alexa uses a very high end sensor, which simultanously has a ADC set for different gain levels, with a crosstalk and can combine these values into information that translates close to 14 stops of DR. We can talk hours about this, but basically a 12 bit adc will never give you more than 12 stops of DR. CLipping in the highlights is a brickwall, while clipping in the shadows is a bit more of a topic where people start to dream and fantasize and turn their alter egos into harsh populist with fake news concepts. Once you ve shot a Xyla chart you can simply see what amount of stops above the ADC noise a camera will capture before it clips. We call these charts XYLA charts, a back illuminated chart with patches with filtration filters, that will get you absolutely scientifically correct stops of light, without color polution, etc. Kine raw mini Patch#By oversampling the latitude doesnt really change that much just a bit cleaner in the shadows and a bit less color pollution by lower chrome artefacts.ĭynamic range is often calculated with a IMA test, you simply show the camera with a neutral lens with a good contrast reproduction, a few patches of light, every patch represents a stop of light. Here at Gafpa Gear we state that by far the highest scoring camera in the Latitude/dR game is the Arri Alexa, it scores 13.5 stops of dr in pixel to pixel and can be upgraded to 14 stops oversampled by 70% to 2k. Here at Gafpa Gear we work with different definitions. Before stating simple numbers we first need to know we are having the same definition of dynamic range. ![]()
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