Tamron 17-50mm f/4 Development Announcement for Sony E

Tamron’s has announced the development of a full-frame 17-50mm f/4 lens for Sony E mount. In the past, combining ultra-wide and normal focal lengths in a single full-frame lens has been quite a challenge. While Sony’s recent 20-70mm started to head in this direction, Tamron is taking things even further on the wide end. Here’s what we know from the development announcement.