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Transcript of Photography in Education TECH2113 Dr. Alaa Sadik Department of Instructional & Learning Technologies...
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Photography in Education
TECH2113Dr. Alaa SadikDepartment of Instructional & Learning Technologies
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Part 2
Shooting
Week 6
Basics of Digital Camera
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Basics of Digital Camera
Key Concepts
Camera Controls The Sensor (Charge-Coupled Device) Pixels and Resolutions Lens and focus Shutter Aperture (F Stop)
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Basics of Digital Camera
Camera Controls
1. Microphone 2. AF-assist Beam 3. Red-Eye Reduction Lamp 4. Self-Timer Lamp 5. Viewfinder Window 6. Flash7. Terminal Cover
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Basics of Digital Camera
8. A/V OUT9. DIGITAL USB Terminal 10. DC IN Terminal 11. Ring12. Lens13. Ring Release Button
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Basics of Digital Camera
1. Indicators2. Power Lamp3. Power Button 4. Zoom Lever 5. Shutter Button6. Shooting Mode Dial7. Mode Switch 8. Print/Share Button 9. Function/Set Button10. Menu Button 11. Display Button
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Basics of Digital Camera
12. Exposure/Erase Image 13. Browsing14. Flash15. Macro/Manual Focus
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Basics of Digital Camera
1. LCD Monitor 2. Viewfinder 3. Speaker4. Wrist Strap Mount5. Memory Card Slot / Battery Cover 6. Memory Card Slot / Battery Cover 7. Tripod Socket
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Basics of Digital Camera
The Sensor A sensor is a device that receives a signal or stimulus (like heat, pressure, light or motion) and responds to it in a distinctive manner.
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Basics of Digital Camera
Charge-Coupled Device (CCD)
A silicon semiconductor by which digital cameras capture their images.
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Basics of Digital Camera
Charge-Coupled Device (CCD)
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Basics of Digital Camera
Charge-Coupled Device (The Digital Camera Sensor) Composed of a matrix of photo-sensitive points called photo-sites that capture photons (light) and converts them to electronic signal.
Use Google to find your own definition of CCD.
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Basics of Digital Camera
Types of Sensors
Foveon Sensor
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Basics of Digital Camera
Foveon Sensor
It uses a matrix of photo-sites, each of which consists of three vertically stacked photo detectors. Each of the three stacked photo detectors responds to different wavelengths of light (Red/Green/Blue)
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Basics of Digital Camera
Types of Sensors
Array Sensor
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Basics of Digital Camera
Types of Sensors
Array Sensor (Bayer’s Sensor) It uses an array for arranging RGB color filters on a square grid of photosensors. The filter pattern is 50% green, 25% red and 25% blue, hence is also called RGBG or GRGB.
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Basics of Digital Camera
Pixels and Resolutions
A pixel (short for picture element) is the smallest single component of an image.
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Basics of Digital Camera
Pixels and Resolutions Each pixel has typically three or four dimensions of variability such as Red, Green and Blue.
The more pixels used to represent an image, the closer the result can resemble the original of an image.
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Basics of Digital Camera
Pixels and Resolutions The number of pixels per inch (ppi) in an image is called the resolution. Image resolution describes the detail an image holds.
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Basics of Digital Camera
Pixels and Resolutions
Pixel counts can be expressed as a: single number (e.g. 3 Megapixel digital camera). pair of numbers (e.g., 640 x 480 VGA display monitor), and therefore has a total number of 640 × 480 = 307,200 pixels or 0.3 Megapixels.
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Basics of Digital Camera
Pixels and Resolutions
A megapixel is 1 million pixels, and is a term used not only for the number of pixels in an image, but also to express the number of image sensor elements of digital cameras.
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Basics of Digital Camera
Lens and Focus
Object Distance
The distance from the center of a lens to the object.
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Basics of Digital Camera
Lens and Focus
Focal Length
The distance from the center of a lens to a point where it focuses light (sensor) in mm.
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Lens and Focus
The focal length determines a camera's field of view. The shorter the focal length, the wider the field of view.
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Basics of Digital Camera
Shutter and Shutter Speed
Shutter is a mechanism in the camera that controls the amount of light that reaches the sensor.
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Basics of Digital Camera
Shutter and Shutter Speed
Shutter speed is the length of time the shutter is open.
A typical shutter speed for photographs taken in sunlight is 1/125th of a second.
The agreed standards for shutter speeds are 1/1000s- 1s.
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Basics of Digital Camera
Shutter and Shutter Speed
Very short shutter speeds are used to freeze fast-moving subjects.
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Basics of Digital Camera
Shutter and Shutter Speed
Very long shutter speeds are used to intentionally blur a moving subject for artistic effect.
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Basics of Digital Camera
Shutter and Shutter Speed
Very long shutter speeds are used to intentionally blur a moving subject for artistic effect.
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Basics of Digital Camera
Shutter: Watch this
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Basics of Digital Camera
Aperture (F-Stop)
Aperture is the size of the opening between the lens and the shutter that lets lights onto the sensor.
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Basics of Digital Camera
Aperture (F-Stop)
Aperture range usually extends from f2.5 to f22.
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Basics of Digital Camera
Aperture (F-Stop)
A small aperture is used when shooting in bright light and vice versa.
The smaller the aperture the slower the shutter speed, vice versa.
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Basics of Digital Camera
Aperture and Shutter Speed
The smaller the aperture the slower the shutter speed, vice versa.
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Basics of Digital Camera
Aperture and Shutter Speed
The smaller the aperture the slower the shutter speed, vice versa.
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Basics of Digital Camera
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Basics of Digital Camera
Aperture and Shutter Speed
Very deep depth ofview
F- 8.0
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Basics of Digital Camera
Aperture and Shutter Speed
Very shallow depth ofview
F- 1.8
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Discussions &Conclusions