Update: “SA Control” is spherical aberration control, this macro lens is also 1.4:1 magnification.
The first images of the upcoming Canon RF 100mm f/2.8L IS USM Macro have leaked ahead of the official announcement, which is expected this month.
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.
Obviously the control ring at the front (a given) was going to be different / new.
The "SA Control" I am guessing is some ability to change the dynamics of spherical aberration perhaps?
If so, that's something new and quite interesting! I love my EF 100mm L IS macro... and had expected to use it with a RF-EF converter.
Though if there are certain benefits of the new RF 100mm f/2.8 lens, that may persuade me to buy it in time.... and use it instead!
EDIT: nvm. I didn't read the original post properly.
Maybe "stabilization assistance", who knows...
Having looked at the patent, I’m gonna guess it does move the entire internal assembly in and out. SA could also be “Scale Adjustment” where you could change the magnification from 1:1 to 1.4:1 etc.
I’m tossing out my earlier wishful thinking in favor of SA meaning “Smoothing Adjustment”. The feature is likely similar to the Defocus Image Control found on the Nikon 105mm f/2 DC lens. Essentially you can control bokeh appearance in the foreground and background by turning the ring. ‘-‘ is for foreground adjustment and ‘+’ is for background adjustment. This is Canon’s patented solution for matching Nikon’s solution.
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that's my guess anyway
Oh, so it's actually intended for electron microscopes?
I live the “slider idea” for the SA.
Edit: Aren’t both possible? I can turn my 70-210mm into a passable macro lens with the right extension tubes.