A few more patents for various “normal” fast prime optical formulas have appeared. Among them, another 35mm f/1.4 mention, as well as a 55 f/1.4. Read the entire patent to see the various optical formula images.
Patent Description (Google Translated)
- Patent Publication No. 2014-123018
- Publication date 2014.7.3
- Filing date 2012.12.21
- Image height = 21.64mm
- Inner focus
|Example||Focal length||Fno.||Half angle||The overall length of the lens||BF||MOD|