A space through which light passes in an optical or photographic instrument, especially the variable opening by which light enters a camera.

In photography, shutter speed or exposure time is the length of time that the film or digital sensor inside the camera is exposed to light when taking a photograph. The amount of light that reaches the film or image sensor is proportional to the exposure time. 1?500 of a second will let half as much light in as 1?250.

In photography, exposure is the amount of light which reaches your camera sensor or film. It is a crucial part of how bright or dark your pictures appear.

There are only two camera settings that affect the actual “luminous exposure” of an image: shutter speed and aperture. The third setting, camera ISO, also affects the brightness of your photos, and it is equally important to understand. Also, you can brighten or darken a photo by editing it in post-processing software like Photoshop on your computer.

ISO is your camera’s sensitivity to light as it pertains to either film or a digital sensor. A lower ISO value means less sensitivity to light, while a higher ISO means more sensitivity.

In photography, focus is the sharpest area of the image. It is the area where the lens works to highlight an object, a person, or a situation. Focus is one of the pillars of photography, along with ISO, aperture, and shutter speed.

You can either use automatic or manual focus. In automatic mode, the camera adjusts the focus in response to incoming light so that the subject appears sharpest. In manual mode, the photographer has to turn the lens’ focus wheel until the desired part of the image is in focus.

When you reflect on something, you think deeply about it. In terms of art, written and verbal reflections encourage pupils to explore their own ideas about their artwork. It enables them to express their own opinion rather than summarise the opinions of others.