can auto focus only be from sensors based on contrast detection?
The question that often arises is, which is better, whether a DSLR camera (Digital Single Lens Reflex) or a mirrorless camera that is very compact size? While mirrorless cameras because they do not have a separate AF module, it must accept the fact that auto focus can only be from sensors based on contrast detection, just like auto focus on pocket cameras, pro sumer cameras and even on smart phone cameras.
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