PENTAX 50mm f/1.4 lens, 49mm filter thread, with a circular PL filter and lens cap. The exterior has some minor scuffs, but no major, critical damage. All parts function. The aperture blades are clean with no oil stains. Operates smoothly. The optics have some minor dust particles, but appear to be free of mold, scratches, and haze. I used this with my K-7. Please understand that this is amateur inspection and a used item. - Model Name: PENTAX 50mm f/1.4 - Filter Diameter: 49mm - Focal Length: 50mm - Maximum Aperture: f/1.4