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Lecture 5 - Optics Video Lecture | Exposing Digital Photography by Harvard Extension School

FAQs on Lecture 5 - Optics Video Lecture - Exposing Digital Photography by Harvard Extension School

1. What is optics photography?

Ans. Optics photography refers to the use of optical devices, such as lenses, to capture and manipulate light in order to create photographs. It involves understanding how light behaves and interacts with different materials and surfaces to produce desired effects in the final image.

2. How do lenses affect photography?

Ans. Lenses play a crucial role in photography as they control the way light enters the camera and hits the image sensor or film. Different lenses have varying focal lengths, which determine the field of view and magnification of the subject. Additionally, lenses can affect the depth of field, sharpness, and distortion in the image.

3. What is the significance of aperture in optics photography?

Ans. Aperture refers to the opening in the lens that controls the amount of light entering the camera. It is represented by the f-number, such as f/2.8 or f/11. The aperture setting affects the depth of field, with wider apertures (lower f-number) creating a shallow depth of field and narrow apertures (higher f-number) resulting in a larger depth of field.

4. How does shutter speed impact photography?

Ans. Shutter speed determines the length of time that the camera's shutter remains open, allowing light to reach the image sensor. A faster shutter speed freezes motion and is ideal for capturing fast-moving subjects, while a slower shutter speed can create motion blur or capture long exposures. The choice of shutter speed depends on the desired effect and lighting conditions.

5. What is the role of ISO in optics photography?

Ans. ISO refers to the sensitivity of the camera's image sensor to light. Higher ISO values result in a brighter image but can introduce more noise or grain. Lower ISO values produce cleaner images but require more light. The ISO setting is crucial in low-light situations or when balancing the exposure triangle with aperture and shutter speed.

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Sep 28, 2025 Last updated

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