Digital Photography and Imaging (WEEK 5)
Digital Photography and Imaging (WEEK 5)
1 November 2023/ Week 5
Rafa Maritza Hertrian/ 0364958
Bachelor of Design (Honours) in Creative Media/ Design Photography and Imaging / Taylor's University
LECTURE
Exposure Setting
Definition of exposure in photography: the amount of light that reaches a
camera sensor or film.
The main parts of a camera
- Camera Body: Shutter, Image sensor, and LCD screen (It is a light-proof box)
- Camera lens: aperture/ Iris
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Figure 5.1.1 Structure of a camera |
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| Figure 5.1.2 Exposure Triangle |
Iris/ Aperture
- Controls the flow of light entering the lens.
- measured by f-stop, indicated by a sequence of f-number: f/1, f/1.4, f/2 , f/ 2.8, f/ 4, f/ 5.6, f/ 8, f/ 11, f/ 16, f/22 , f/32..
- The lower the f-number, the larger the lens opening
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| Figure 5.1.2 Iris/Aperture f-number |
Shutter Speed
- What is it: small plastic sheet that opens and closes to allow light onto the film or prevent light from reaching the film
- Shutter speed and aperture are the two camera settings that affect the actual "luminous exposure" of an image.
- Shutter speed is measured in seconds: 1/1000 s,1/500 s,1/250 s,1/125 s,1/60 s,1/30 s,1/15 s,1/8 s,1/4 s,1/2 s,1 s, 2 s, 3 s…
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Figure 5.1.3 Shutter speed visualization |
ISO: Affects the brightness of photos
- referred to the sensitivity of film with its ability to gather light
- For digital photography, ISO refers to the sensitivity—the signal gain—of the camera's sensor.
- The common ISO camera settings are: 100, 200, 400, 640, 800, 1600, 3200, 6400….
- The lower the number of ISO the less sensitive your camera is to light and the finer the grain.
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| Figure 5.1.4 ISO value |
Lens Perspective
There are different types of lens which includes wide-angle lens, standard
lens, and tele lens. The chosen lens gives different effects to an angle of
view and the appropriate lens provides the desired framing
Different categories of lenses have a different purpose and are determined
by its focal length
FOCAL LENGTH
- The shorter the focal length, the wider the angle of view, and vice-versa.
- Focal length is the measurement (in millimeters) from the optical center of a camera lens to the camera’s sensor.
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| Figure 5.2.1 Focal length diagram |
Depth of Field
- The smaller the aperture you use, the greater the depth of field.
- The smaller the aperture you use, the greater the depth of field.
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| Figure 5.2.2 Depth of Field |
- Wide-angle lens: ideal for fitting large areas in a frame. Commonly used to capture landscapes or do street photography. With this type of lens, almost everything is focused unless there is an object in front of the camera
- Standard lens: a fairly accurate representation of a human's eyesight in visual angle and perspective. This makes pictures taken with a standard lens look more natural.
- Tele lens: is the most effective lens to isolate objects that are far away from the camera. With its magnification, we can take pictures from a distance.
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| Figure 5.2.3 Wide angle lens, standard lens, and tele lens |
DSLR V.S SMARTPHONE
Smartphones vs Cameras = Convenience vs Quality
DSLRs are created to give the best quality pictures while smartphones are
created to have a lot of functions in one device which makes the quality less
pleasing. Smartphones have a very limited-size lens and sensor compared to
DSLRs which is why smartphones' camera quality is not the best but it is
convenient to be carried every day.
PRACTICAL
Digital Imaging Exercise 01 - PART 1 (SHAZAM)
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| Figure 5.3.1 Shazam selection process |
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Figure 5.3.2 Shazam in Hearst Mansion process |
Digital Imaging Exercise 01 - PART 2 (MY REFLECTION)
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Figure 5.3.3 My image selection process |
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FINAL RESULTS
Digital Imaging Exercise 01 - PART 1 (SHAZAM)
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| Figure 5.4.1 Shazam in Hearst Mansion FINAL |
Digital Imaging Exercise 01 - PART 2 (MY REFLECTION)
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