Hii, i'm a newbie. I meet a circumstance where i want to secretly take a photo to a bunch a people for their smile when they gather together and have laughter. i tried changing my shutter speed but that would make it too slow and if i change my aperture it will became too dark. (ISO at 1600) and i don't want to use flash because that would make the people looks not so natural. please if there is any technique please say!!!!!!!