What Does The Light Meter Do

By | 12/10/2022

When and why to use a light meter
Posted On 30th March 2017 To
Beginner Series

When and why to use a light meter

Although many picture cameras accept inbuilt light metering systems, a light meter instrument tin can also exist used.

Light Meters can measure out the amount of calorie-free falling on a discipline (incident lite), or being reflected past a subject (cogitating light). By converting these measurements, it defines what would exist the virtually beneficial shutter speed and f/stop to use for that given subject.

Light Meters are particularly helpful where subject area matter / lighting conditions are difficult. Some light meters are also able to measure flash light.

For picture show cameras with a congenital-in exposure meter, they typically measure out an average of the overall scene beingness photographed. In general, this form of metering will requite good results. However, when shooting complicated lighting or complicated subject matter, for instance white snow scenes or scenes with high contrast areas, due to the cameras metering taking an average information technology can pb to an automatic aligning which could upshot in over or under bounty of exposure.

A Low-cal Meter can help to overcome this and typically works in two means:

Reflective readings

Reflective readings on a Light Meter will requite you lot accurate results in most circumstances and closely resemble a photographic camera’s meter. They measure lite reflected from the field of study. This means if the meter sensor is pointed at the snow or dark areas, so similar exposure bug volition arise as they would for a camera with an inbuilt meter.

Incident readings

Over or nether adjustment compensation can be overcome past taking an incident light reading. The meter measures the calorie-free falling onto the subject and therefore does not go confused by the field of study’s reflective qualities. As it is not trying to achieve an average measurement this type of metering tin assist avoid under/over compensation issues.

Source: https://www.ilfordphoto.com/using-light-meter/