Photography Metering Study Guide

specular highlights are a subset of highlights produced by light sources. Examples are street lights, car head lights, or very bright sunlight from windows or mirrors. They are so bright that they don't contain detail and aren't considered highlights. They typically print as pure white within a photograph.

what are specular highlights

spot metering

This metering mode chooses the exposure by using the brightness at a very small area in either the center or focus point of the picture. * This ensures that one small part of your subject is properly exposed, but it can cause the background to be severely underexposed or overexposed

center weight metering

it assumes that the subject of interest is in the middle of the photograph and meters the amount of light bouncing off the subject (the reflected light) and chooses an aperture and shutter speed to render that scene as a well exposed photograph

matrix meteringcamera divides the scene into segments and uses formulas to derive a proper exposure level for the entire scene.there are different ways of how to expose a photographwhy do you use 3 different metering modesoverexposure is when there is too much light in the photo (it is too bright), underexposure is when the photo is too darkwhat is the difference between overexposed and underexposed photosexposure compensation is where you get to choose the amount of exposure that you want to have. You should use exposure compensation when there is nothing of the middle gray value.what is exposure compensation and when should you use itthe camera takes measurements of the incoming light towards the subjecthow is exposure compensation measuredbracketingtaking several shots of the same subjects using different camera settings.a graphical representation of the values of various pixels within an image. It is used to determine whether your photographic exposure was successful.what is a histogram and what does it tell youclippingsome highlights are pure white or if some objects are pure blackempty space on either end of the histogram usually means that the image has no bright highlights or dark shadowswhat does it mean when there is empty space at either end of the histogramin most cases, you will probably be using shutter speeds of 1/60 of a second or faster to avoid camera shakewhat is the slowest shutter speed that you should use to avoid camera shakethe slow shutter speeds stay open for a longer period of time. They are usually measured in lower fractions of a second. (ex. 1/60, 1/125 ). Slow shutter speeds mean that the shutter will stay open for a relatively long period. * Slow shutter speeds are used in dim light conditons, to achieve motion blur, or to increase depth of fieldwhat are the slow shutter speeds and why would you use themfast shutter speeds are usually measured in higher fractions of a second (ex. 1/2000). The faster the shutter speed, the sharper a moving image will bewhat are the fast shutter speeds and why do you use themstopa change in illumination. This change can be in shutter speed or aperture