DIGITAL PHOTOGRAPHY AND IMAGING - WEEK 5
WEEK 5 (11/5/2023)
Lectures: Digital Photography
Exposure Setting
Exposure: The amount of light which reaches your camera sensor or film.
The main parts of the camera:
- Camera body: Shutter, Image sensor, and LCD screen
- Camera lens: Aperture/ Iris
The shutter speed and aperture affects the "luminous exposure" of an image whereas the camera ISO affects the brightness of the image.
- Iris: Iris/Aperture controls the flow of light entering the lens. It is measured by f-stop, indicated by 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 .... The lower the f-number, the larger the lens opening.
- Shutter: a small plastic sheet that opens and closes to allow light onto the film or prevent light from reaching the film. 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…
- 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
Lens Perspective
The are wide angle lens, standard lens and tele lens.
Appropriate lens provided desire framing, lens choice affects angle of view.
Lenses can be categorised by focal length.
FOCAL LENGTH:
- It is the measurement (in millimeters) from the optical center of a camera lens to the camera’s sensor.
- The shorter the focal length, the wider the angle of view and vice-versa.
DEPTH OF FIELD:
- The proportion of the image that is reasonably sharp and in focus.
- The smaller the aperture you use, the greater the depth of field.
Different lenses are designed for different for different purposes.
Wide angle lens:
- Ideal for fitting a large area into your frame.
- Useful for landscape photography or street photography.
- Almost everything is in focus unless your subject is very close to the lens.
Standard lens:
- Offers a fairly accurate representation of what the human eye sees, both in terms of visual angle and perspective.
- Images are perceived as more natural.
Tele lens:
- Great for isolating a subject that is far away.
- Allows you to photograph subjects from a distance thanks to their magnification.
DSLR vs Smartphone
- Smartphones vs Cameras = Convenience vs Quality
- DSLR cameras are designed to capture images. Phones are designed to carry out a multitude of functions.
- Entry-level DSLR have much larger lenses and sensors than mobile phones do.
Tutorial
Mr Fauzi provided a demo video of how to make a DIY photography studio at home. Thia video is useful for the Hearst Mansion Exercise and Project 4.
Practical: Hearst Mansion Exercise
We were instructed to follow the demo video that was provided by our lecturer and edit the Shazam into the background picture given.
Shazam
Hearst Mansion - Background
Work-in-progress:
I went to select and mask Shazam by using the magic wand tool and changed the brightness and hue of him to match with the background.
Figure 4.1 Masked Shazam
Figure 4.2 Add Shadow for Shazam
Figure 4.3 Add Reflection of Shazam
Figure 4.4 Add Shadow for Shazam's Reflection
Figure 4.5 Practice Outcome
Part 2: My Reflection
In this exercise, we are required insert our own photo to replace the SHAZAM’s layer.
Figyre 4.6 Me
I chose a picture of myself that is considered taken at eye level for this exercise. Then I inserted my picture into the My Reflection composition and applied the Shazam's exercise technique.
Work-in-progress:
I went to select and mask myself by using the magic wand tool and changed the brightness and hue of myself to match with the background.
Figure 4.7 Masked Myself
Figure 4.8 Add Shadow for Myself
Figure 4.9 Add Reflection of Myself
Figure 4.10 Add Shadow for My Reflection
Final Outcome:
Figure 4.11 Final Outcome
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