There’s more details below… Fully Auto Calibration We can use this information to improve confidence in microadjustment calibration results, to figure out calibration values from the AF Consistency test, and to determine focus shift in the Aperture Sharpness test. All this information from a single image file! Not only can we find out how far from “perfect focus” any point is, but we can also find out which direction the focus is shifted in – front or back. The Dual Pixel Raw files contain all the information necessary to determine the focus position at any point on the sensor.
Canon themselves have demonstrated a few tricks that can be performed with this extra information within their DPP software – micro refocusing of images, shifting of bokeh and reduction of ghosting. With the addition of Dual Pixel Raw capability, Canon now allows the information from both halves of these pixels to be saved in the image files. However, up until this most recent camera the dual-pixel magic was kept solely inside the camera. The Dual Pixel system has been used on the sensors of the 7D Mark II, 80D, 1D X Mark II and now the 5D Mark IV. By cutting each pixel in half and having the halves look in slightly different directions, the camera can determine how to quickly and accurately focus at almost any point on the sensor. Dual Pixel Sensor Structure.Ĭanon introduced the first Dual Pixel sensor in the EOS 70D camera to bring an unprecedented autofocus system to the live view capability of this camera. The answer is… quite a lot! Image © Canon Europe. Following on from our previous post on the subject, we’ve been investigating how these files can help with autofocus calibration and general camera analysis. With the introduction of the EOS 5D Mark IV, Canon opened up some new possibilities for image processing with the introduction of Dual Pixel Raw files.
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