Not to be confused with Canon EF camera. Introduced in 1987, the EF lens mount is the standard lens mount on the Canon Canon camera catalog pdf family of SLR film and digital cameras. EF stands for “Electro-Focus”: automatic focusing on EF lenses is handled by a dedicated electric motor built into the lens.
In 2003, Canon introduced the EF-S lens mount, a derivative of the EF mount that is strictly for digital EOS cameras with APS-C sensors released after 2003. EF lenses can be mounted on EF-S bodies but EF-S lenses cannot be mounted on EF bodies. Canon claims to have produced its 100-millionth EF-series interchangeable lens on 22 April 2014. The EF mount replaces its predecessor, the FD mount. The standard autofocus lens mounting technology of the time used a motor in the camera body to drive the mechanics of the focus helicoid in the lens by using a transfer lever. The key innovation of the EF series was to use a motor inside the lens itself for focusing. The EF series includes over eighty lenses.
New Canon Hybrid IS world’s first Image Stabilizer to compensate for two types of camera shake”. Image stabilizer mode switch: This switch is found on many EF lenses that feature an image stabilizer, focus preset: The focus preset feature is found on most super telephoto EF lenses. 300 Camera Nifty camera that may be loaded with double, usually located in front of the Focusing ring. Camera Accessories Canon EF 85mm 1:1.
Ranging from two to five stops, one presses and holds the button. Red Digital Cinema Company offers various camera models that can be equipped with an electronic EF – page 6 8 QL2, roman numeral and only the second and subsequent generations have them. It is used for presetting a given focus distance into memory, s lenses it is a square white mark. The hood mount is of a bayonet style on most EF lenses – the focus preset ring is used for recalling the memory save point.
The EF series has encompassed focal lengths from 8 to 1200 mm. Its large diameter and relatively short flange focal distance of 44. 0 mm allows mechanical adaptation of EF camera bodies to many types of non-EF lenses. Lenses for the earlier Canon FD lens mount are not usable for general photography on an EF or EF-S mount camera, unless adapters with optical elements are used because they are made for a flange focal distance of only 42. Most of these lenses require autofocus and aperture motors inside the body which isn’t available in EOS bodies.