Tamron just announced a trio of featherweight full-frame lenses for Sony E-mount, each of which weighs less than eight ounces and offers a 1:2 macro capability. The new Di III OSD M1:2 range of F2.8 primes are highly portable options for Sony shooters, which sacrifice lens brightness for impressive compactness and light weight.

We’re still waiting to see results from these new lenses, but we had the chance to check them out in person at last week’s Photo Plus Expo in New York.
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https://www.dpreview.com/articles/2605727789/hands-on-with-tamron-new-24mm-and-35mm-di-iii-osd-m1-2?utm_source=self-desktop&utm_medium=marquee&utm_campaign=traffic_source