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