Galaxy Note8: What is Dual capture feature and how does the feature operate?

With one shot, you can capture both a photo with the focus on the subject(Live Focus) and a wide angle
background (Normal image).

If the Dual capture feature is ON while the user takes Live Focus photos (with the telephoto camera),
the main camera also takes photos simultaneously. Therefore, this feature enables:

   ① (Telephoto camera) User can get object-oriented out-of-focus photos (portrait)

   ② (Main camera) User can get photos containing backgrounds as well. (portrait + background)