A new patent filed by Canon Japan shows multiple optical formulas for an RF 50mm f/1. 4 and f/1. 8 design as well as a new RF 35mm f/1. 4. The patents deal with increasing focusing speed when using lenses with large diameter elements.
All the designs filed use a modern optical design for the front and rear […]. petapixel.com
2020-11-5 18:55