Note: Autofocus (AF) works either by using contrast sensors within the camera (passive AF) or by emitting a signal to illuminate or estimate distance to the subject (active AF). Passive AF can be …

May 14, 2008 · Phase Detection vs Contrast Detection Autofocus (AF) I don't understand the technologies and merits behind these two autofocus (AF) modes, but I noticed a few camera …

Aug 6, 2012 · How works a phase detection autofocus? I am an amateur photographer of film cameras trying to learn a little about digital photography. This is the reason for my technical questions. How …

Jun 19, 2014 · Phase Detection Autofocus This AF method is most prevalent in digital SLR cameras. It requires dedicated hardware (line and cross-type autofocus sensors) which can increase the overall …

Jul 12, 2014 · Re: Phase, contrast, or manual focus for wildlife photography? Yes, but sometimes when birds (other wildlife as well) are sitting amongst branches or other foliage etc, using manual focus …

Apr 1, 2016 · PDAF, the focusing method in many cameras should NOT mean "Phase Detection Auto Focus", it is a much simpler concept, Parallax Detection Auto Focus. The working method of …

Oct 19, 2010 · "Less light reaching sensor, due to portion of the light being reflected to phase-detection autofocus array (approximately 1/2 EV in current designs)." [Wikipedia] The Nikon gets 4.5 shots in …

Nov 8, 2012 · Then do comparison shots using autofocus (centre point) and either manual focus in magnified Live View and/or Live View mode focus (contrast detection). The latter two modes use the …

Mar 25, 2014 · From now on, I will refuse to use the term "phase detection autofocus" for triangulating AF. There is no such thing as phase detection AF in digital cameras. Last edited by Inkanyezi; 26th …

The circular polarizing variety is designed so that the camera's metering and autofocus systems can still function. Linear polarizers are much less expensive, but cannot be used with most digital SLR …