Tamron patented a series of APS-C travel zooms from 18-100mm up to 18-500mm
Tamron patented a variation of travel zooms made for APS-C mirrorless cameras:
- 18-100mm f/4.0-5.6
- 18-200mm f/3.5-6.5
- 18-260mm f/3.5-6.5
- 18-290mm f/3.5-6.5
- 18-390mm f/3.5-6.5
- 18-490mm f/3.5-6.5
via Hi Lows Note