Tamron Unveils 28-75mm f/2.8 for Sony, 70-210mm f/4 for Canon/Nikon

Tamron has just unveiled two new full-frame lenses. The first is a 28-75mm f/2. 8 lens that’s being developed for Sony mirrorless cameras, and the second is a 70-210mm f/4 lens that will be launching soon for Canon and Nikon DSLRs.