While making the most of these advantages of catadioptric system, optimal positioning of the optical system based on Canon’s own new optical design technology is used to properly compensate for various aberrations including aberration changes resulting from focusing that tend to occur in reflex lenses, providing quality image reproduction in all shooting ranges from close distances to infinity.
 
Moreover, in order to prevent reductions in contrast resulting from inner reflection, which is a problem in reflex lenses, the entire lens is given multilayered coating in addition to meticulous consideration being taken, such as electrostatic flocking being performed inside the lens barrel.
 
Furthermore, it has the feature of filters being able to be replaced with the lens attached to the camera by adopting a filter that is inserted into the light path.
 
The virtues of mirror telephoto lens design are well known: compactness, light weight, close focusing, and excellent handling. The Canon 500mm F/8 Reflex Lens incorporates all of these benefits, plus the unique optical benefits of Super Spectra Coating.
 
Because it has no diaphragm, aperture may be controlled through the use of Canon ND filters in 34mm size, which fit conveniently into a filter slot at the rear of the lens A built-in rotating tripod collar and provision for focusing past infinity (in cold weather) round out the superb features of this fine lens. It's ideal for photographers who need a lot of long lens power and like to travel light.
 
This is the only mirror lens in the FD series. Its mirror construction not only makes it convenient for hand-held shooting but enables easier correction of chromatic aberration for super sharp images. With its front group focusing system, close focusing requires only slight lens extension. Its fixed f/8 aperture makes it particularly suited to use with the A-1 in the stopped-down AE mode. Great for photographers on the move and for special creative effects.
 
Upon visual inspection, this lens shows normal signs of cosmetic wear due to its age. The lens appears to be in very good condition. Please see all the pictures for condition details. All mechanical parts seem to function properly. Due to its age, it is being sold "as is"
 
Both front and rear lens caps are included.