Is the Tamron 17-28mm f/2.8 worth it?

Yes for Sony full-frame shooters who want a light f/2.8 ultrawide without paying G Master prices. At $695.99 at Bass Tokyo as of November 4, 2026, it undercuts most first-party alternatives.

How does it compare with the Sony 16-35mm f/2.8 GM?

The Sony is wider at both ends, sharper at the edges and better built, but costs far more and is heavier. The Tamron is the lighter, cheaper choice for most hobbyists.

Does it work on APS-C Sony cameras?

Yes, it mounts on E-mount APS-C bodies and covers a roughly 25.5-42mm equivalent field of view. You lose the ultrawide look, so it makes more sense on full frame.

Is it good for astrophotography?

It is a popular budget choice for night skies at 17mm f/2.8, with decent coma control. Stop down slightly to f/3.5 for cleaner stars in the corners.

The lens, front and rear caps, and a lens hood. It does not include a case or tripod collar.

Prices on this lens tend to dip during major sales events and when a successor is announced. Track the price history before buying if you are not in a hurry.