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Update: “SA Control” is spherical aberration control, this macro lens is also 1.4:1 magnification.
What is interesting about this lens is on the barrel. It says “SA Control” and there is a scale on the barrel. If you have any idea what that is, sound off on the forum! This lens still has the normal manual focus ring, as well as the control ring. So this is something new. Could it be related to a recent patent?
The official announcement date and pricing have yet to leak out.