The Oppo Find X2 and Find X2 Pro use Sony's new sensor with 2x2 on-chip lens. Oppo calls this tech Omni-Directional Focus and with good reason. The company released a promo video touting the advantages of the new tech, though it aims more at entertainment than education. When Dual Pixel autofocus arrived, it was a massive improvement over basic phase detection AF. Essentially, in Dual Pixel every pixel is actually made out of two photodiodes. This means that every pixel can be used for focus detection, unlike regular phase detection AF where only a small number of pixels (around 5%)...
Source: https://www.gsmarena.com/oppo_find_x2_promo_video_shows_the_advantages_of_omnidirectional_af_over_dual_pixel_af-news-41914.php
