Canon Single-Focus Lens EF50mm F1.8 STM Includes HAKUBA lens cover and genuine hood Brand: Canon Focal Length: 50mm Lens Type: 6 elements in 5 groups Compatible Mount: Canon EF Camera Lens Description: Single-focus lens Maximum Focal Length: 50 mm Angle of View: Standard F1.8 Bright maximum aperture Equivalent to approximately 80mm focal length in 35mm format Uses a stepping motor (STM) Minimum focusing distance: 35cm Maximum magnification: 0.21x Features a black ring (outer circumference) Uses metal (mount) Purchased several years ago and used a few times. No dust or mold observed inside the lens, but please understand this is a visual inspection by an amateur.