Canon Dual Pixel Raw Observations
According to the Canon Digital Photo Professional instruction manual ghosting reduction reduces the appearance of ghosting in images caused by unwanted internal reflections inside a lens
Ghosting can occur when shooting towards bright object.
Image with ghosting from a 24-70 f 2.8 L lens shoot at 24mm f 5.6 - lens hood was removed to intentionally make ghosting happened
Ghosting of image at 50% zoom
Ghosting reduction applied to image. Ghosting brightness is reduced but still very obvious
Ghosting reduction not only can reduce ghosting inside a camera lens, it can reduce reflections on a shinny surface such as glass window or tank also!
Image of glass fish tank took using a 50mm f 1.4 lens at f 1.4. A lot of ambient light reflections are visible.
Image with ghosting reduction applied, light reflections are dimmer and narrower. Some the brightness changes are a bit harsh and unnatural looking, the select area function of Digital Photo Professional can limit the changes to only the important part - such as the fish's back
Next: Dynamic Range Extension