Here are two new Canon patents . The optical formulas are for RF 100-400mm f/5.0-7.1, RF 100-300mm f/5.6-8.2 and RF-S 55-250mm f/4.5-7.1 lenses. Note that the last one has an “RF-S”.
We can say that the RF 100-400mm f/5.0-7.1 and RF 100-300mm f/5.6-8.2 Canon lenses seem to be inexpensive telephoto lenses for RF-mount full frame mirrorless cameras. According to the designation, the RF-S 55-250mm f/4.5-7.1 is clearly designed for an APS-C sensor. Continue reading “New Patent : Canon RF 100-400mm f/5.0-7.1 & RF 100-300mm f/5.6-8.2 Lens”