Focus performance that does not depend on the object shape or pattern

Since conventional phase difference detection methods separated the pixels laterally for detection, they were not very good at detecting objects which lacked pattern change in the horizontal direction (ex: objects composed of edges in the horizontal direction).

However, 2x2 OCL is able to detect vertically in addition to horizontally, which enables high-speed auto focus using phase differences in every situation.

The figures below show the phase difference detection characteristics of objects with edges at various angles: