This item is a large and fast germanium objective lens for a thermal imager or thermal imaging camera. The focal length is 200mm, and the aperture is F1.3 The front element measures 15cm in diameter. Branded PPE, not sure of the company name?

This lens has a fixed aperture, and fixed focus. The body has a threaded rear mounting. At the front, a dust cap is included. Works well on our thermal camera!

The lens condition is very good. The front element is near perfect, the rear one has some signs of degradation. As commonly seen with germanium lenses, the AR coating has flaked a little.