Canon Patent Application: Mixed Ultrawides and RF-S 10-20mm F4.0
In this patent application (2024-007656), Canon looks to create small ultra wides for both full frame and crop. One of the designs is curiously either similar or is the RF-S 10-18mm f/4. 5-6. 3. If it is the actual RF-S 10-18, then it also gives us the lowest back focus distance for the RF mount that Canon [. canonrumors.com »