500mm F/8.0 Telephoto Mirror Lens
Color Black - Durable metal housing - Lens construction: 7 elements in 6 groups - Focus distance: 500mm - Minimum focus distance: 1.73m - Focus modes: Manual focus - Magnification ratio: 1 : 2.1 - Image surface: 36 x 24 - Aperture: f/8.0 - Filter size: 30.5mm - Comes with a carrying pouch and 3 rear filters - Compatible with Pentax U/PK Canon Nikon Olympus 4/3 Sony Minolta cameras Note: This item can't use without a T-mount adapter.