Compatible with SLR / DSLR Cameras Utilizing A T-mount Adapter (not included) The Ultimaxx 500mm f/8.0 multi coated high-power preset telephoto lens is precision made of lightweight aluminum alloy construction. The multi coated, anti-reflection high index / low dispersion optics assures virtually flare free images resulting in crisp, detailed, high contrast images, even under the most adverse lighting conditions. Aperture settings of f/8.0 to f/32 retain a full range of exposure and depth settings. Designed to maximize day and night shots by providing maximum light & image transmission with minimum distortion. This lens features a rotating tripod mount, front and rear lens caps and a convenient soft carrying case. Product Details Filter Size: 67mm. Aperture Settings: F 8.0, 11, 16, 22, & 32. Angle of View: 5 degrees. Minimum Focus Distance: 33ft. Groups / Elements: 4/4. Lens Coating: Multi Coated. Length: 11.75". Weight: 1.4lbs. 10 year Limited Warranty.