This lens has a focal length of 135mm, a bright aperture of f/2.8, and a soft focus function. - Model Name: EF 135mm f/2.8 - Focal Length: 135mm - Aperture: f/2.8 - Autofocus/Manual Focus: AF/M - Soft Focus Function: Yes Thank you for viewing. This item is offered as-is due to untested functionality.