Trans focus telephoto lens 200mm focal length 35mm equivalent with special optical elements providing exceptionally smooth defocus effect apodization optical element distributes light rays for smooth de focused backgrounds contrasting strongly with subjects in sharp focus wide focus ring and manual aperture ring providing additional control over defocus 135mm fixed focal length lens 200mm focal length 35mm equivalent f28 aperture range f28 31 for alpha minolta maxxum dslrs smooth tra