This D.O. Industries Golden Navitar 100-200mm f/3.5 Kodak Slide Projector Zoom Lens is a great addition to any photographer's collection. With its auto and manual focus type, this lens allows for flexibility in capturing the perfect shot. The maximum aperture of f/3.5 ensures beautiful and sharp images. The lens is designed for use with Kodak slide projectors and is compatible with a variety of cameras and photo equipment. The brand D.O. Industries is well-known for its superior quality and durability, making this lens a reliable choice for any photography enthusiast.