Old-fashioned term for exposure value or EV. The principle of exposure calculations is that each step in shutter speed or lens aperture corresponds to a doubling or a halving of the light value. In this way it’s easy to play [...]
Tag Archive for 'Aperture (lens)'
This is the simplest kind of automatic exposure mode and it’s found on every digital camera. What the camera does is measure the light level and then choose a combination of shutter speed and lens aperture which will produce the [...]
The lens aperture setting. The numbers may appear arbitrary, but they follow a mathematical sequence where each one lets through half the light of the one before. The sequence is (starting with the largest aperture) f1.0, f1.4, f2.0, f2.8, f4.0, [...]
Choosing a suitable shutter speed and aperture. Exposure technique is an art which relies on the effect that the photographer is trying to achieve – something that the camera, for all its sophisticated automated exposure systems, can’t possibly know. Light-toned [...]
Depth of field is the near-to-far sharpness in a photo. When you focus on an object, in theory only that object will be perfectly sharp, and anything in the foreground or background will be progressively more blurred depending on its [...]
Variable hole in the lens used to control exposure. The size of this hole is adjusted to control the amount of light – along with shutter speed, this is how the exposure is controlled. Lens apertures have standard values which apply [...]