500mm F8 Telephoto Lens with T2-AI Adapter Ring for Nikon D3000 D3100 D7000 D80 D90 D7100 D5100 DSLR Cameras Description 1. This Studio Series lens is computer designed using a combination of lenticular light refraction and reflection optics - the same physics used in many professional telescopes. Combined with advanced manufacturing techniques, the result is a lens with very sharp image quality with less color aberration which is considered to be the single most harmful factor in telephoto photography. 2. This lens is a very complex optical instrument, manufactured with precision, it is also compact and light. It is ideal for Wildlife and sports photography. It has a fixed aperture of f8. It comes with a soft pouch and three (3) rear-mounted 30.5mm filters- ND2, ND4, and Skylight. Features: 1. This manual 500mm ultra-telephoto, multi-coated mirror lens is ideal for sports and wildlife photography. 2. It has a fixed aperture of f/8.0, which is faster than most other 500mm lenses. 3. 6 elements in 6 groups. 4. This combination provides the user with an extremely sharp image with minimal color aberration. 5. Manual focus, fixed circular aperture. 6. Compatible with most SLRs and DSLRs. Specifications: Lens construction: 6 elements in 6 groups Aperture range: 8.0 Package size: 11.5*17.5*11.5 cm / 4.5*6.9*4.5in Package Weight: 460g Package List: 1*500mm F8.0 Mirror Lens 1* Front Lens Cap 1* Cap Rear Lens Bag 1 * Lens Bag 1 * Nikon T2-Ring Adapter