SA Control
What is SA Control On Canon Lenses? SA Control is a feature that was first introduced on the Canon RF 100mm f/2.8 L Macro lens. It stands for Spherical Aberration Control and gives you some manual control of the bokeh characteristics. Many people have dubbed it the “bokeh control ring”, and it is very similar to Nikon’s Defocus Control (DC) system. With the ring placed in the central position, a lens with SA Control will deliver a normal, sharp image. If the control ring is rotated left or right, an electronic cam actuates the focusing and floating lens groups independently …
