Asobinet spotted a newly published patent that describes the optical design of this 17-50mm f/4 Full Frame E-mount lens with internal zoom:
- Focal length: 17.520-48.483
- F-value: 4.120
- Half angle of view: 110.747-47.366
- Image height: 21.633
- Overall length: 134.456
- Back focus: 18.462-50.815
