Asobinet spotted a newly published patent that describes two lens designs. One is the currently available Sony 70-200mm GMII and the other one is a new yet not announced lens. The 150-400mm with constant f/4.0 aperture:
- Focal length: 154.53-387.86
- F-value: 4.12
- Angle of view: 15.94-6.39
- Image height: 21.64
- Total length: 339.98
A patent is NOT a guarantee that this lens will hit retail. But it shows what Sony engineers are thinking about. This would be a variation of the current Sony FE 100-400mm f/4.5-5.6 GM OSS lens. And maybe the differences are to small to justify the production of a 150-400mm variant. What’s your take on this?