Manual Mode Quiz – Master Full Exposure Control

Aperture controls how much light reaches the sensor during the exposure. It works the same way whether your light is coming from the room, sunlight, or a flash. Wider apertures gather more light and create shallower depth of field; smaller apertures gather less light and deepen the zone of sharpness.

The exposure meter indicator shows where the current aperture-shutter-ISO combination sits relative to what the meter calculates as correct exposure. A reading at zero indicates a metered exposure; readings below or above indicate under or overexposure by the number of stops shown.

Aperture directly controls depth of field. A wider opening (smaller f-number like f/2.8) brings less in focus, isolating your subject. A smaller opening (larger f-number like f/16) keeps more in focus across the scene. This is your main tool for separating subject from background or holding everything sharp.

A reading of -2 stops indicates that the current settings are delivering two stops less light than the meter calculates as a correct exposure. The resulting image will be significantly darker than the metered scene, with shadow detail compressed and possible loss of detail in dark areas.

Metering is how your camera measures light to calculate exposure. Spot metering reads a small area; center-weighted reads the middle more heavily; matrix metering averages the whole scene. Understanding metering helps you know when the camera's meter will be fooled and when you need to adjust.

Evaluative metering averages the entire frame including the bright background, which causes it to underexpose the darker foreground subject. Spot metering from the face ignores the bright background and calculates exposure from the subject's actual luminance, producing correctly exposed skin tones.

In manual mode, aperture, shutter speed, and ISO are fixed until the photographer changes them. Pointing the camera at a different part of the scene, as evaluative or centre-weighted metering does automatically, cannot shift the exposure. This makes manual mode ideal when the light is consistent and the camera's position changes frequently.

Aperture controls how much light reaches the sensor during the exposure. It works the same way whether your light is coming from the room, sunlight, or a flash. Wider apertures gather more light and create shallower depth of field; smaller apertures gather less light and deepen the zone of sharpness.

Aperture directly controls depth of field. A wider opening (smaller f-number like f/2.8) brings less in focus, isolating your subject. A smaller opening (larger f-number like f/16) keeps more in focus across the scene. This is your main tool for separating subject from background or holding everything sharp.

A histogram is a graph of tones in your image, from dark on the left to bright on the right. It shows where your exposure sits and helps you catch blown highlights or crushed shadows before you leave the scene. Learning to read a histogram removes guesswork from exposure.