High-performance 50mm prime lens, with an F1.8 aperture for beautiful bokeh. I have been using it regularly. It works without any problems. I believe there is no dust, haze, or fungus! Please understand that this is a used item before purchasing! - Model: PENTAX-DA 50mm F1.8 - Focal Length: 50mm - Maximum Aperture: F1.8 - Lens Type: Prime lens - Features: SMC coating Thank you for looking.