Canon RF135mm F1.8 L IS USM: B&H Photo / Amazon / Adorama Canon filed a patent for a Canon RF135mm f/2 that has been found. Canon currently has a Canon RF135mm F1.8 L IS USM that is very expensive so a f/2 lens without IS could be an affordable option in the future. overview [Publication … Continue reading Canon RF 135mm f/2 Patent Found