Apple’s new “Deep Fusion” iOS feature, better known as “Pull Mode,” is now available on the iPhone 11, 11 Pro and 11 Pro Max thanks to a new developer update. Deep Fusion combines several exposures, similar to HDR, to create more detailed images. Unlike HDR, Apple says that these exposures are mixed at the pixel level.
The feature is also optimized for working with textures such as skin, clothing, and foliage. Deep Fusion is compatible with the iPhone 11’s wide-screen camera, while the iPhone 11 Pro and Pro Max can use this feature with their telephoto and wide-angle lenses, but not their ultra-wide lens. Apple claims that Deep Fusion is only compatible with its A13 chip, the processor of the iPhone 11 and 11 Pro. This means that the new advanced photography feature is unlikely to reach older iPhones eventually.
By the time you pressed the shutter button, the iPhone 11 has already captured three images at high speed to prevent movement. Touching the shutter then takes three more photos, plus a more prolonged final exposure that captures more detail. These images are then merged into what Apple calls a “long synthetic” photograph.
Deep Fusion then selects the short exposure image that contains the most detail and merges it with the synthetic long image. Finally, the photos are processed pixel by pixel by Apple’s algorithm before the final photo is completed. This part of the process takes place behind the scenes, and you will see a “proxy image” in your film until the picture is ready.
For now, Deep Fusion is only available in iOS 13’s iPhone 11 and 11 Pro developer beta versions, but should soon make its way to the public and final beta of this system.