It is a wide-angle lens with a fixed/prime focal length of 135mm and a maximum aperture of f/2.8. 

This lens is compatible with filter size of 55mm. 

The lens series is MF Vivitar 135mm F2.8 and it has an auto focus type. 

This lens is perfect for capturing detailed and crisp images. 

It is in great condition and well-maintained, with no signs of wear and tear. 

The lens is ideal for photography enthusiasts and professionals who want to capture stunning and high-quality images.