1、High Aperture of F8: The F8 large aperture allows for increased light transmission, enhancing shutter speed, making it ideal for low light and night scenes, and creating better foreground or background blur. 2、Quality Optics: Utilizing premium multi coated optical glass design, 9 rounded aperture blades, and a 6 groups 6 pieces lens optical structure, the optical glass ensures minimal image distortion, excellent image clarity, contrast, and a minimum focusing distance of only 5 feet. 3、Focal Scale and Focus Ring: Equipped with a focal scale and a stable focus ring for easy use, this telephoto lens is perfect for long distance shooting, ideal for outdoor photography, portraits, and landscapes. 4、Compatibility: Compatible with both full frame and APS C format cameras, this manual lens features no electronic contacts, meaning the camera cannot detect the lens once mounted. 5、Compatible Cameras: Compatible with various digital SLR cameras such as for 80D, 70D, 60D, 60Da, 50D, 7D, 6D, 5D, 5DS, 1Ds, T6s, T6i, T5i, T5, T4i, T3i, T3, T2i, and SL 1 x Lens1 x Carrying Bag1 x Instruction Manual Item Type: Camera Telephoto LensMaterial: Alloy, Optical GlassWeight: Approx. 539g/ 19.0ozFocal Length: 135mm Fixed FocusAperture: f 2.8 to f22Image Format: Full FrameMinimum Focus Distance: 1.5mOptical Structure: 6 Pieces 6 GroupsMaximum Magnification Ratio: 0.11Aperture Blades: 9