Features: 8mm f/3.0 Fisheye lens, an excellent addition to any photographer collection, allowing you to expand your creativity from truly unique perspective and record incredible scenes. Super multilayer lens coating can reduce glared-light and double-images, helping you achieve the best color balance. Digital imaging format conforming to APS-C (1:1Sx) size. Realize 8mm focal length and 180 degree diagonal viewing angle of APS-C size. When fully opened, it can produce high resolution and high contrast in the center of the lens and around the lens. Removable petal bayonet-mount hood and super multi-layer coating help control flaring and double images level. The combination of solid aluminum base reduces the wear on the bayonet-mount during long-term use and makes the lens more durable. Specifications: Material: Magnesium Aluminum Alloy+Optical Glass+Multi-layer Coating Size: Standard Size Name: 8mm F3.0 Aspherical Fisheye Lens, Wide Angle Lens Aperture: F3.0-F22 Angle of View: 180 degrees diagonal Minimum Focusing Distance: about 0.1meter/3.93inch Lens Construction: 11 Element in 8 Groups Frame: half frame (support full frame) Number of Diaphragm Blades: 6pcs Lens Type: Manual Lens Foacl Length: Wide-angle Fixed-focus Anti-shake: no Lens Hood: detachable(not included) Applicable Model: for 550D 650D 750D 77D 80D 1100D DSLR Cameras Package Includes: 1x 8mm F3.0 Aspherical Fisheye Lens 1x Front Lens Cover 1x Rear Lens Cover 1x Lens Pouch note: Because the lens completely manual and has no CPU contact, some cameras cannot recognize it. Please switch the camera to manual mode. If the images are too dark, you can reduce the f-stop of the lens, and/or reduce the shutter speed, and/or increase the ISO-setting of the camera. If the images are too bright, you can adjust it in reverse. If the focal length of the images are not enough, adjust the focusing distance of the lens to the correct distance. In some photography situations, you will find that f/5.6-8 easier to be focused than f/3.5.