f/2.8
Tamron · ultra-wide
Tamron 11-20mm F2.8 Di III-A RXD
Tamron lenses for Fujifilm
The only third-party maker here that builds zooms and nothing else.
4 lenses from Tamron for Fujifilm. 0 are Fujifilm’s own and 4 come from 1 other brands, among them Tamron. Focal lengths run from 11 mm to 500 mm, 0 are primes and 4 are zooms. The fastest opens at f/2.8. 0 are weather sealed and 3 have optical stabilization.
All four Tamron lenses for X mount are zooms, and three of them carry the maker's own stabilisation. That matters on Fujifilm bodies without in-body stabilisation, where a stabilised lens is the only stabilisation you get.
The 17-70mm f/2.8 is the widest-reaching constant-aperture standard zoom on the mount, 26–105mm equivalent at a single f-stop. The 11-20mm f/2.8 handles wide work at the same aperture. The other two chase reach instead: 18-300mm covers 27–450mm equivalent in one lens, and the 150-500mm goes to 750mm equivalent — the longest reach available for X mount from aynone, Fujifilm included.
Third-party 4
f/2.8
Tamron · ultra-wide
Tamron 11-20mm F2.8 Di III-A RXD