CMP151 Study guide #1 for Exam 1
CMP151 Study guide #1 for Exam 1 cmp151
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This 2 page Study Guide was uploaded by odette antabi on Friday January 29, 2016. The Study Guide belongs to cmp151 at University of Miami taught by Allegro in Summer 2015. Since its upload, it has received 33 views. For similar materials see Introduction to Digital Production in Cinema And Media Studies at University of Miami.
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Date Created: 01/29/16
CMP 151 STUDY GUIDE #1 1. What is the relationship between the IRIS diameter (T- Stop/f-Stop) and the depth of the field? - The smaller the iris, larger is the F stop, the critical depth to field - Critical depth to field: if you move slowly the focus would have a critical change. 2. When you open up the iris by one full stop what is the effect on exposure (the amount of light being transmitted to the sensor)? - Twice the light will enter. 3. If the camera has less light than necessary for correct exposure what are the kinds of effects this will have on the recorded image? - Tonal degradation - Color fidelity - Picture noise (dark areas) 4. Identify the ways you can control exposure with the Panasonic HMC150. - Iris: F-stop - Neutral density filters 3,6,9 - The ISO setting: controls the sensitivity of the sensor - If don’t work put subject in different area. 5. What might you do to expose your subject in a scene that has very high contrast (a backlight problem, or dark areas where detail is obscured)? - Move the ISO up and down - Upper will gain digital noise - Best way is to keep the ISO lowest possible - High contrast: is the difference between what is bright and is not bright 6. What do you understand by selective exposure? - Pick the right exposure for a part of the frame to be perfect. 7. Define depth of field and list the factors that affect it. Explain each. - Depth of field: range of what is in perfect focus. The closer the more critical. - F stop: the bigger the number, the smaller the iris aperture , critical depth to field - Focal length: length of lenses. Long lenses: narrow, critical depth of field, compress space. Wide lenses: compress to the middle, grater depth. - Camera to subject distance: the closer the critical 8. What do you understand by “selective focus”? - Picking one thing to be in focus and leaving the other thing out of focus. Ex: the father and his son, who is in focus, tell their relationship. 9. What does MFD mean? How might you deal with this issue in shooting your subject? - MDF: minimal focus distance - Deal with macro lenses or move the subject farther. 10. What is a variable focal length? - Zoom lens 11. What do you understand by wide angle, normal and telephoto lens setting? - Wide angle: compresses space to the middle, see more perificy. Nose will prolong ate, face will be thinner. Seem is moving faster as the camera moves. Background will be in focus - Normal lenses: approximates our eyesight. Focus in the middle - Telephoto: compress space between objects, no reference point, and looks like things are moving very slow. The background will be soft. Critical depth to field. 12. Do you recall some of the “distortions” caused by different lens type? Describe them. 13. Why change the lens angle? - For variety 14. What is the difference between a Zoom and DOLLY shot? - In zoom the central image gets bigger, it gets out of frame. - In dolly changes perspective, zooms do not move. Focal length: how long is the lens. For 35mm reference Standard: 50mm. like eye sight Telephoto: twice the normal. 80mm approx. Wide Angle: half the normal. 30mm approx.
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