This is a used Canon EF 100mm f/2.8 USM Macro lens, a popular and highly-regarded lens for close-up photography. It is capable of true 1:1 life-size magnification, making it perfect for capturing intricate details of subjects like flowers, insects, and small products. The lens also doubles as an excellent portrait lens due to its 100mm focal length and wide f/2.8 aperture.
 
Key Features:
Focal Length: 100mm (ideal for macro and portrait photography)
Aperture: f/2.8 (great for low light and creating beautiful bokeh)
Macro: True 1:1 life-size magnification
USM (Ultrasonic Motor): Offers fast, quiet, and precise autofocus.
Compatibility: Works with all Canon EOS DSLRs and 35mm film cameras.
 
Condition: The lens appears to be in good, used condition. The body is clean and the focus and aperture rings move smoothly. The front and rear glass elements appear clear, and the lens comes with filter glass and rear caps.