This is a very lightly used (2-3 times) Micro Four Thirds lense in excellent condition.

From the manufacturer:

The Panasonic Lumix G X Vario 12-35mm (H-HS12035) represents a next step in digital interchangeable zoom lens design for Lumix G Series cameras. It's the first Lumix G Vario constant F2.8 zoom suitable for professionals and enthusiasts capturing a wide range of scenes from dynamic landscapes to available light and studio lit portraits.