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Camera Autofocus Systems Explained: Phase, Contrast, Hybrid, DFD https://ift.tt/2CNnPai Camera manufacturers have been utilizing different types of autofocus systems in modern digital cameras. If you’d like a primer on how each one works, here’s a fantastic 18-minute video by tech tester Gerald Undone that will bring you up to speed. Gerald examines the systems in three cameras: the Canon EOS R with its Dual Pixel AF, the Sony a7 III with its hybrid phase-detection, and the Panasonic Lumix G9 with its Depth from Defocus (DFD) technology. In addition to explaining how the major AF systems work, Gerald also helpfully explains strengths and shortcomings, giving you the knowledge you need to determine which AF type is right for your needs. Here’s a table of contents for the video with the timestamps of the topics discussed: 01:20: Misconception: Everyone Thinks Contrast Detection is Bad If you don’t need extreme autofocus performance, a contrast-detection system will be perfectly fine for you, Gerald says. It won’t be a limitation, and in many cases will even be a strength. For fast and erratically moving subjects, Gerald recommends a modern hybrid system. If you’re looking for an easy, well-rounded system that performs well in most situations, Canon’s Dual Pixel AF is his recommendation. “But honestly, we’re in great times here when it comes to autofocus,” Gerald concludes. “There’s so many great systems and so much innovation that I think a lot of unnecessary hypercriticism is put on autofocus, especially when it doesn’t affect our bottom lines. “Cameras aren’t perfect. Autofocus isn’t perfect. And we can’t demand perfection from them because of the very way that they function. What we can do is use them like tools. Understand how they work and try and find the best tool for the job and the best way to use it in that situation.” If you found this video helpful, you can find more of Gerald’s videos by subscribing to his YouTube channel. Photography News via PetaPixel https://petapixel.com October 16, 2018 at 12:44PM
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