Tamron announced its B091 constant-F2.8 standard zoom on October 14. The lens uses 14 elements in 10 groups and a VXD linear-motor autofocus drive. Sony E and Canon RF versions are scheduled for October 29; Nikon Z for November 19 and Fujifilm X for December 17. These are planned launch dates, not evidence of shipments today.
GLOBAL IMAGING BRIEF
A single optical design spanning four APS-C mounts makes platform compatibility and mount-specific validation as important as the common 16-50mm optical specification. Commercial reception remains to be seen after release.
Original source
This brief is an original summary based on the cited public source.