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COMPUTER ASSISNMENT
PPT ABOUT PHOTO GRAPHY
DONE BY:
J. HARSHAN IX-B2
Digital photography uses an array of electronic photodetectors to capture the image focused by the lens, as opposed to an exposure on photographic film. The captured image is thendigitized and stored as a computer file ready for digital processing, viewing, digital publishing or printing.Until the advent of such technology, photographs were made by exposing light sensitivephotographic film, and used chemical photographic processing to develop and stabilize the image. By contrast, digital photographs can be displayed, printed, stored, manipulated, transmitted, and archived using digital and computer techniques, without chemical processing.Digital photography is one of several forms of digital imaging. Digital images are also created by non-photographic equipment such as computer tomography scanners and radio telescopes. Digital images can also be made by scanning other photographic images
Digital photography
Choosing the Best Camera
•Not a once in a lifetime purchase anymore.
•Select one which can do the job you want Today and as per your future requirement•Some kinds of cameras do. some kinds of things better or more easily e.g., Sports photography vs. Close-up
portraits. •Price isn’t the best indicator.
TYPES OF CAMERAS
• WEB CAMERAS AND MOBILE CAMERAS
• POINT AND SHOOT CAMERAS
• ADVANCED CONSUMER MODEL
• PROSUMER Dslr models
• Professional cameras
RESOLUTION AND PRINT SIZES
Resolution Avg. quality Best quality Resolution
0.5 megapixels 3x5 in.
N/A 800 x 600
2 megapixels 8x10 in.
3x5 in. 1600 x 1200
4 megapixels 11x14 in.
5x7 in. 2300 x 1700
6 megapixels 16x20 in.
8x0 in. 3000 x 2000
10+ megapixels
25x40 in.
13x17 in. 3888+ x 2592+
PHOTOGRAPHY TECHNICALITY
Anti-BlurAnti-ShakeImage StabilizationVibration Reduction
•A technology that stabilizes the lens to
effectively reduce blur due to camera shake
HISTOGRAM
METERING
How the camera measures the amount of light available to expose a picture
•Centre-Weighted: Readings are taken at various part of the picture, with a special emphasis for the centre. •Spot: Readings are taken at a specific point. •Each camera manufacturer has its own variations (Evaluative Metering)
WHITE BALANCE
The ability to adjust colours based on white as
a reference colour to give as true a white as possible
•All other colours are corrected accordingly •Auto WB (AWB): the camera determines
and selects the correct colour temperature for white.
WHITE BALANCESome preset white balance settings are daylight, cloudy, tungsten, or fluorescent.
[ Ev +/-] Exposure-Compensation
Aperture, Depth of Field, Shutter Speed, ISO, Noise
APERTURE
a hole or an opening through which light travels
It causes variations in the Depth of Field within the image
f16
f2.8
Shutter Speed •Amount of time the picture is exposed •Short/Fast shutter speed •Long/Slow shutter speed
1/8th
1/30th
1/60th
1/500th
RESULTS OF VARYING SHUTTER SPEED
Which shutter speed is the best
ISO 100
ISO 1600
Shutter Priority
Shutter Priority: Allows you to decide the shutter speed (e.g. fast
at 1/500 sec. for stop action photography, or slow at 2 sec. for night photography), and the camera decides the best aperture.
Aperture Priority
Aperture Priority: Allows you to choose the aperture (e.g. large at
F1.8 for portrait, of small at F16 for landscapes).
Manual
You have complete creative control in selecting both the shutter and aperture.
Auto
All digital cameras usually have an Auto mode: the camera decides for you the best shutter speed/aperture settings.
AUTO
Landscape photography
Primary function is to allow a large depth of field.
Landscape mode tells the camera to default
to a large Depth of Field (Small Aperture)–f16.
Portrait Photography
This mode is not well suited for full-length portraits or groups of people Portrait mode tells the camera to default to a: •Small Depth of Field (Large Aperture)– f1.8
Sports/Action Photography
tells the camera to default its settings toward
capturing images faster This is done by: •Increasing Shutter Speed •Increasing ISO
Night Photography
This preset slows down the shutter speed to allow a lot of light into the camera. •Both the foreground and background of the image are properly exposed. •very useful in taking low-light images where you do not want the background to be black
EXIF (exchangeable image file)• EXIF (exchangeable image file) data is a
record of what camera settings were used to take a photograph.
EXIF data stores information like camera model, exposure, aperture, ISO, what camera mode was used .....
To interpret this EXIF data, you will need an EXIF viewer. There are many ways to go about this. Your image processing program should provide that functionality within the program.
For beginners, reading an images EXIF data can be a very useful learning tool....
Night photography
Take a number of shots at different shutter speed/aperture combinations.
Ensure your LCD brightness is set to Normal, not Bright, for a truer representation of your recorded image.
A good aperture to start with is F4.0 or F5.6 (for greatest depth of field), and adjust shutter speed up or down until you're satisfied with the shot.
Always bring and use a tripod. It's quite common to have exposures of an entire second or more during night-time photography.
Bring along a flashlight. A pocket flashlight is
essential when you're doing photography at night.
Minimalistic photography
Minimalistic photos is creating ‘empty’ spaces in the photograph....
The eye of the person looking at the image can’t help but be drawn to the element of the image you’ve taken.... the subject!
“make your subject the strongest point of your photo even though it might take up only a small part of the overall image”....
When I’m attempting to take a show with a minimalist feel to it I keep those words in mind.
pick subjects wisely experiment with color use depth of fieldcrop out distractionsZoom In or out...
19th century studio camera standing on tripod and using plates
Box camera, one of the first mass-produced pocket cameras using film, c. 1900
Compact Kodak folding camera from 1922
Evolution of the camera
Leica-II, one of the first 135 film cameras, 1932
Contax S of 1949 – the first pentaprism SLR
Polaroid Colorpack 80 instant camera, c 1975
Digital camera, Canon Ixus class, c. 2000.
Nikon D1, the first digital SLR used in journalism and sports photography, c. 2000
Smartphone with built-in camera spreads private images globally, c. 2010
THANK YOU
THANK YOU FOR U R COOPERATION