Canon News has uncovered a patent showing optical formulas for fast RF zoom lenses, likely of the L variety. The purpose of the patent is to showcase a high-performance zoom lens design.
Of the three embodiments in this patent, only the RF 35-135mm f/2.8 seems like a design that has a slight chance of becoming a consumer product.
Patent: Canon RF 35-135mm f/2.8
Canon RF 35-135mm f/2.8
Canon RF 35-135mm f/2.8
Canon RF 35-135mm f/2.8
Canon RF 35-135mm f/2.8...
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