The Vivitar 50mm 1:1.7 MC Camera Lens is a high-quality lens designed for Pentax K mount cameras. With a maximum aperture of 1:1.7, this lens is ideal for capturing sharp images with beautiful depth of field. The auto focus feature makes it easy to quickly and accurately focus on your subject, while the 50mm focal length is perfect for everyday photography needs. Whether you're a beginner or a pro, this Vivitar lens is a versatile and reliable option for your photography gear collection.