Canon G15
reveals several changes of design, those are flash lamps which
recently uses pop-up mecanism. The location of rolled button of
exposure compensation will be taken over by that flash lamps.
Other
interesting changes to discuss is clues of apenture di front of lens.
Even though G15 and G12 still rely on optical zoom 5x, which it's
equivalent to 28-140 mm, however, Canon G15 is different to lens, having
apentures f/1.8-2.8, it's wider than G12, having f/2.8-4.5.It means
Canon begin to seriously come back lens accompanied by wide apenture.
At this times, Canon embeds newest image processing processor, DIGIC V, so that the camera can apply new features, such as automatic correction of chromatic aberration.