Tamron might be planning another lens with a weird focal range

Tamron 35-150mm f/2-2.8 Di III VXD.

Tamron is no stranger to producing lenses with unconventional focal ranges. There's the 35-150mm f/2-2.8 Di III VXD, 20-40mm f/2.8 Di III VXD, 17-70mm f/2.8 Di III-A VC RXD, and most recently, the 35-100mm f/2.8 Di III VXD. All are excellent lenses though, with their non-standard focal lengths bringing benefits like additional shot versatility and better overall portability.

The 17-70mm f/2.8 Di III-A VC RXD - it goes usefully wider than a traditional 24-70mm (Image credit: Matthew Richards)