Tamron's compact 35mm for Sony — the f/2.8 Di III OSD part of the tiny prime trio.
The Tamron 35mm f/2.8 Di III OSD is a compact wide-normal prime from Tamron's Di III OSD series for Sony FE full-frame E-mount, designed as an affordable compact alternative to Sony's native 35mm options. Di III confirms mirrorless-native design, and OSD indicates the ultrasonic AF motor.
The lens delivers 35mm at f/2.8 maximum aperture with OSD autofocus for fast and quiet AF, Sony FE electronic coupling, weather-resistant sealing, and a compact, lightweight Di III construction.
Tamron's Di III OSD prime range targets Sony FE photographers who want compact, affordable, and weather-resistant primes at a lower price than Sony's G and GM equivalents. The 35mm is the widest of the matched OSD prime trio (35mm, 20mm, 17mm) and covers the classic street and documentary perspective.
Test OSD autofocus speed and accuracy. Check weather seal integrity. Inspect element condition. Confirm Di III full-frame coverage with no vignetting.