RTF 318 � INTRO TO IMAGE AND SOUND

RTF 318 � INTRO TO IMAGE AND SOUND - RTF 318 INTRO...

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RTF 318 – INTRO TO IMAGE AND SOUND 15/01/2008 18:55:00 Jan 15 Vonnegut’s writing formula ?  !  . Jan 17 THE LENS: CLASS OVERVIEW The single most important decision a director makes is choosing the lens to  use Lens: made up of several pieces of glass elements that are mounted into a  barrel THE LENS: EYE OF THE CAMERA SYSTEM 4 FUNCTIONS CONTROLLED BY LENS most important : depth of field IMAGE FOCUS Extremely important – takes up most of the time Technique: **clip from the Graduate** QUANTITY OF LIGHT F-stops work like the iris’ of our eyes Iris = aperture  Open/close f-stop – from f 1.4 to f 2 you cut in half the amount of light let into  the camera by the lens barrel, go from f 4 to f 2 you double to light
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F-STOP FORMULA o Focal length Changing the aperture changes the exposure of the film Fast lenses – lenses that have a big aperture opening – more expensive  – can shoot a larger range of things Slow – small maximum aperture opening IMAGE AREA 3 types of lenses:  wide angle = wide angle of view = distorts distance,  makes things seem larger, normal = human eye perspective, long lens =  narrow angle of view = compresses space = flattens the image = most actors  like to be shot with a long lens and in fashion magazines fixed forcal length = lenses that don’t zoom = prime lenses = lenses that are  used in cinema **clip from the graduate – long lens shot = the great distance he has to go  through, turn corner and get wide lens shot **extremely wide lens – clip from touch of evil DEPTH OF FIELD Controlled by 3 factors: lens opening, focus distance (physical distance between camera and subject), focal length – actual length of lens Small opening = more depth of field, larger the opening = smaller f stop number = less dof Longer lens = less dof, shorter = a ton of dof 1/3 : 2/3 rule = 1/2 the distance in front in focus as the distance behind. Double the amount of focus behind the person you’re shooting. Hyperfocal distance = when the lens is set at this hfd the dof extends from half of that distance to infinity. Paparazzi, sports photogs, war photogs use this. Focused at 20’2’’ then at 10’1’’ to infin will be in focus DOF and format
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Larger the format, the more shallow the dof Format and dof are intertwined, it actually has to do with the fact that you  need wider angle lens to work with a smaller format. Jan 22
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This note was uploaded on 03/25/2008 for the course RTF 318 taught by Professor Steinbauer during the Spring '08 term at University of Texas at Austin.

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RTF 318 � INTRO TO IMAGE AND SOUND - RTF 318 INTRO...

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