The Vivitar 800mm f/8 Mirror Lens is an excellent addition to your camera gear. It opens up powerful opportunities without compromising quality. Using an advanced reflex design, our lens is a fraction of the size and weight of a traditional 800mm. It focuses as close as 11 Feet, with a fixed aperture of f/8. The Super Spectra Coatings assure virtually flare free photographs even under adverse lighting conditions. A simple T-mount adapter makes this lens work with both film and digital SLR cameras.