Just posted: Our Canon EOS 70D hands-on preview

@yabokkie – it’s still a 20mp sensor. No need for “those who have little knowledge of image sensor technology” to jump to the irrational conclusion that it’ll actually deliver 40mp of resolution. I’m sure that if the new sensor actually delivered abundantly more resolution, Canon would have gladly bragged about it. But clearly, it just means that two photodiodes are used to make a *single* pixel, and that the *dual pixel* phrase only refers to the two photodiodes being used for phase detection. In reality, a more apt phrase would have been “dual diode”, rather than “dual pixel”, but for marketing I’m sure “dual pixel” just sounded better because people are more familiar with the word “pixel” than “diode”. And of course, people will naturally (and falsely) associate more “pixels” (dual pixels, after all!) with more image quality– at least for those who “who have little knowledge of image sensor technology.”

Source Article from http://www.dpreview.com/news/2013/07/02/just-posted-canon-eos-70d-hands-on-preview-dual-pixel-cmos-af-slr