I think I always had an idea about how autofocus was done but the last 2 slides have been really interesting and eye opening as to how it is done. I think i've always just taken for granted that my camera just knew something I didn't.
Interesting article here that covers some of the pros and cons to phase vs contrast autofocus. Because Phase detection AF doesn't have to 'probe' the image to find the best spot, it is much faster than contrast AF. However, it appears contrast AF works much better in low light situations. Most modern cameras seem to have a hybrid mode that combines both and also lets you switch between them.
I think I always had an idea about how autofocus was done but the last 2 slides have been really interesting and eye opening as to how it is done. I think i've always just taken for granted that my camera just knew something I didn't.
https://photographylife.com/autofocus-modes#phase-detection-af-vs-contrast-detection-af-vs-hybrid-af
Interesting article here that covers some of the pros and cons to phase vs contrast autofocus. Because Phase detection AF doesn't have to 'probe' the image to find the best spot, it is much faster than contrast AF. However, it appears contrast AF works much better in low light situations. Most modern cameras seem to have a hybrid mode that combines both and also lets you switch between them.