COM ARTS 155 1st Edition Lecture 1 Outline of Current Lecture I Focal Length II Aperture III Depth of Field IV Shutter Speed V Film Speed VI ISO Current Lecture Focal Length Definition Distance from the center of the glass elements that make up the lens to the image plane a light sensitive surface Zooming in creates a long focal length telephoto while zooming out creates a shorter focal length wide angle Telephoto makes a space look more compressed it blurs the background and makes the focus pop Wide angle brings a lot more into focus Aperture This is how much light we re letting into the lens The higher you set the F Stop the less light you allow in f 5 6 or f 5 8 gives lighting for the best dynamic range Changing the aperture can allow you to capture things in shadows without them being black or capturing things in light without them being over exposed Depth of Field DOF is the amount of area that will be in focus at a given distance Three factors control DOF Focus Focal length Aperture Greatest DOF at Wide angle lens shorter focal length Smaller apertures letting in less light higher f stop Focus ring set at infinity Shutter Speed Definition How long the shutter exposes the camera s sensor to light 50 1 50 sec 2 2 sec Slower speeds more light but more chance of blur These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Faster speeds less light less blur Film Speed High speed more light sensitive fast filmstock more grainy Low speed requires more light slow filmstock richer blacks and colors ISO ISO is digital film speed it is the same as gain setting GH2 ISO Sweet Spot ISO 640 Higher begins to introduce noise and color distortion Lower ISOs will likely be dark in most situations If you are shooting on slow ISO or film you will need more light and a wider aperture lower f stop If you want a large depth of field you should consider A wide angle lens B smaller aperture higher f stop
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