The Tokina RMC 28mm f/2.8 lens is a prime lens with a manual focus mechanism, perfect for photographers looking for precise control over their shots. With a maximum aperture of f/2.8, this lens is ideal for shooting in low light conditions or capturing a shallow depth of field. The lens is compatible with a 52mm front lens filter, allowing photographers to easily attach filters for additional creative effects. The Tokina RMC 28mm f/2.8 lens is designed for Pentax K mount cameras, offering a focal length of 28mm for versatile shooting capabilities.