1. A computer-implemented method, comprising: displaying in real time on a display of a mobile device, a visual representation of a scene within a field of view of a camera of the mobile device; providing a graduated neutral density (GND) filter option on the display of the mobile device in conjunction with the visual representation of the scene; receiving a selection of the GND filter option; receiving GND filter portion input representing two portions of the visual representation of the scene; receiving a GND filter characteristic representing an amount of light reduction corresponding to one of the two portions of the visual representation of the scene; adjusting in real time brightness of the visual representation of the scene in response to the GND filter portion input and the GND filter characteristic; determining one or both of an f-stop setting and a shutter speed for the camera based on the GND filter portion input and the GND filter characteristic, wherein one or both of the f-stop setting and the shutter speed are determined based on a weighted average corresponding to a first amount of light associated with a first portion of the scene corresponding to a first portion of the two portions of the visual representation and a second amount of light associated with a second portion of the scene corresponding to a second portion of the two portions of the visual representation; and capturing an image of the scene with the camera using the f-stop setting and the shutter speed.