sports photography where the subject may shift its position in the frame rapidly. EOS cameras equipped with ECF were the EOS A2E (U.S. model names are shown; see the table below for equivalents in other countries), EOS Elan IIE, EOS IXe, EOS-3, EOS Elan 7E, and EOS Elan 7NE. Canon did not continue its use of eye-controlled focusing for its digital SLRs. The EOS Elan 7NE was the last EOS camera to have this function, until in 2021 Canon reintroduced eye-controlled focus with the EOS R3. Quick control dial Most prosumer and professional level EOS cameras feature a large quick control dial (QCD) on the camera back. The first consumer-level EOS camera with this feature was the EOS 760D/Rebel T6s, announced in February 2015. This feature allows easy adjustment of certain parameters using the thumb. The QCD is used for quick access to often-used functions that would otherwise require a more complicated procedure of button presses and dial clicks. Settings such as ISO button, Exposure Compensation button, or menus are all easily available through the QCD. Cameras equipped with the QCD can easily be operated with one hand (forefinger on the main dial, thumb on the QCD) without taking the eye off the viewfinder. A QCD is programmed to perform useful functions, which may include setting exposure compensation, setting of aperture in manual exposure mode, and scrolling of images and menus in digital EOS cameras. Multi-point autofocus system Currently, top-line EOS cameras have either 61 or 65 user-selectable autofocus (AF) points. Autofocus is a camera's ability to focus a lens automatically on an object by pressing down on the shutter button. Autofocus most often chooses the closest image in the field of view to focus on. The following EOS cameras feature such a system, with 61 points unless otherwise indicated: The EOS 5D Mark III, introduced in March 2012. The EOS-1D X, announced in October 2011 and originally scheduled for sale in April 2012, but delayed until June 2012. Since replaced by a Mark II version. The EOS 7D Mark II, on sale since November 2014. This APS-C body has Canon's first (and so far only) 65-point AF system. The EOS 5Ds and 5Ds R, two closely related higher-resolution full-frame bodies otherwise similar to the 5D MkIII, announced in February 2015 with sales beginning in June of that year. The EOS-1D X Mark II, the replacement for the original 1D