Typical graduated filters are darkest at one end, and gradually lighten up along the length of the filter. These are essential for any landscape photographer’s kit, and are commonly used when the sun is above the frame, for instance in the late afternoon. They help balance the exposure of a bright sky and a darker foreground scene. The problem with this filter when photographing sunsets, is that the frame is typically brightest towards the middle, or top third, of the frame, meaning …