The Pentax Smcp-fa 645 45mm f/2.8 Lens is a quintessential tool for the discerning photographer seeking to elevate their craft with professional-grade equipment. This high-quality, durable lens is designed to deliver unparalleled clarity and versatility, making it a reliable choice for a wide range of photographic endeavors.Crafted for the Pentax 645 camera system, the lens boasts a standard focal length of 45mm, offering a natural perspective that closely resembles the human eye. Its wide f/2.8 aperture not only facilitates a shallow depth of field for stunning bokeh effects but also excels in challenging low-light conditions, allowing photographers to capture crisp, vibrant images without the need for additional lighting.The lens's optical construction features 9 elements in 8 groups, meticulously engineered to minimize distortion and chromatic aberrations.