Tamron 17-70 vs Sony 18-135: Which one is BETTER for HIKING? - YouTube
Mint, w/case Tamron SP 28 28-135mm f4-4.5 BBAR Macro Canon FD Lens from Japan | eBay
Amazon.com : Tamron 28-200mm F/2.8-5.6 Di III RXD Lens for Sony Mirrorless Full Frame/APS-C E-Mount Cameras (AFA071S700) with Advanced Accessory Sony e Mount 28-200 mm : Electronics
The Tamron SP 28-135 mm f/ 4-4.5 Adaptall-2 model 28A Lens. Specs. MTF Charts. User Reviews.