Hi. I had a basic understanding of aperture, shuttle speed, iso and exposure. When i was doing my shoot at night, i will definitely put the aperture to the lowest f number. And if the object is moving, i increase the shuttle speed to prevent it from bluring. I think im quite ok with playing ard aperture and shuttle speed. But when it comes to iso and exposure, im lost. It seems to me that iso and exposure is the same, brighting and darking the picture which can be also can done by adjusting the aperture and shuttle speed. Can someone claify the relationship between aperture, shuttle speed, iso and exposure in term of the effect in the pic. And how do u adjust your setting while doing shoot ?