Wednesday, June 26, 2019

What is Digital Camera and its function?

What is Digital Camera?

What is Digital Camera and its function?

Digital Camera:

The word camera is taken from a Latin word "camera obscura" which implies "dark chamber".
Digital camera is a camera (It is the hardware device that takes photographs) that captures photos in digital memory. However, unlike film cameras, digital cameras can display images on screen immediately after recording, and can store or delete images from memory.
Digital cameras are integrated with a wide range of digital devices from Personal Digital Assistant (PDA) and mobile phones to Hubble and Webb Space Telescopes. Digital photography, e-mail and CD / DVD, TV and computer monitors are compatible with the Web and the data can be stored on PC. Some digital cameras have an inbuilt GPS receiver, which is used for geological photographs.
The main advantage of digital photography is visibility of instant video and image. The Image Attider software is used for combing of cropping, recording, contrast / impact adjustment and one or more images.

What was the first digital camera available to the public?

The first digital camera was invented by Steven Sasson Eastman in 1975. The digital camera came among the people in the 1990s. In 2000, such cameras made their identities even in the film industry. After the year 2010, these cameras came in the smartphone too.

How does digital camera works?

In the Digital Camera, When you press the button to take a picture, the aperture is open and a light flow in front of the camera through the lens. So far, it is similar to a movie camera. From this point, however, everything is different. There is no film in the digital camera. Instead, there is an electronic device that captures incoming light rays and converts them into electrical signals. This light-weight detector is one of 2 types, either a charge-coupled device (CCD) or a CMOS image sensor.
If you have ever watched your monitor or television screen, you might have seen that the pictures are made up of millions of small colored dots, which are called pixels. Laptop's LCD computer screens also make their images using pixels, though they are often too small to see. In a television or computer screen, electronic devices turn all these colorful pixels on and off very fast. The light from the screen goes to your eyes and your brain sees a large, moving picture.
In a digital camera, this is exactly the opposite. The light that comes in the camera lens comes with light. This incoming "picture" image hits the sensor chip, which divides it into millions of pixels. The sensor measures the colour and brightness of every picture element and stores it as a number. Your digital photograph is effectively a long string of numbers in which the exact description of each pixel is described.

What are the advantages of a digital camera?

Advantages: There are different type of advantages are available.

  • Thousands of photos can be stored in a small memory card.
  • The image or video can also be deleted to free up space in it.
  • The video can be recorded along with voice in it.
  • Some digital cameras can also be cropped in pictures.

What are the different types of digital cameras?

Types of digital cameras the different types of these cameras.

1. Compact Digital Camera:
Compact Digital Camera

These cameras are smaller in size so that it is easy to carry. The smallest cameras with thickness of less than 20mm are also defined as Subcompact or Ultracompact. Compact cameras are designed in such a way that the quality of their pictures is also excellent.
Most compact cameras have internal flashes with little power but enough for nearby objects. These images are saved only in JPEG format. In order to reduce the cost and reduce the size, the image sensor with 6mm diagonal is used.

2. Bridge Digital Camera:

Bridge Digital Camera

 It is the high-level digital camera that has a textured DSLR camera.
Their size is big but the image sensor is small. Many Bridge cameras have special lenses with more capacity and zooming capabilities are also high. Bridge crews lack the arrangement of viewing on the other side, just like DSLR.

3. Digital Single Lens Reflex Camera (DSLR Camera):

Digital Single Lens Reflex Camera (DSLR Camera)

The DSLR camera is a kind of High Level camera that captures photos and videos in digital format and records it with the help of an electronic image sensor. The sensor size in these cameras is large, whose diagonal usually ranges from 18mm to 36mm.
Other lenses can also be added to such cameras. The lenses used in these are also very advance. Its lenses and Advance feature make your image perfect. These cameras also have the facility of viewing on the other side.

4. Electronic Viewfinder (EVF):

Electronic Viewfinder (EVF)

It's just a combination of very large sensors and interchangeable lenses. The preview is created using an EVF. There is no complicated mechanism like DSLR.

5. Digital Rangefinder Camera:

Digital Rangefinder Camera

 Digital Rangefinder Camera Such cameras are used to measure distances of objects that were ever used in film cameras.

6. Line Scan Camera:
Line Scan Camera

These cameras are use the Pixel Sensor instead of the matrix. The line scan camera works to scan, wait and repeat any line. The data of this type of camera is accessed by a computer.

What are the parts of Digital Camera?


Front Parts of Digital Camera

Back Parts of Digital Camera

Parts of Digital Camera
Here is a quick introduction to the key component of average digital camera:

Shutter Button: this button is use to take a picture.

Control Buttons: By the use of this button we can set the different camera settings.

Shooting Mode Dial: Various switch modes, adjusting exposure options, and other similar options.

Focus-Assist Light: It helps in the state of dim light.

Microphone: capture audio for movie/video or to activate the timer set even on sound-triggers.

Optical Viewfinder: It is used to frame and compose your picture.

Electronic Flash: It provides extra light in your seen. Sometimes it can be useful to provide slightly extra light during the dim, low light conditions.

Zoom Lens and Control: It is used to Increases or decreases the size of the image. Lenses are either fixed on the body or can be interchangeable. They may also be different in focal length, aperture, and other details.

Docking Port: Used to transfer photos, recharge batteries, make prints, or perform other tasks.

Tripod Socket: It is used to attach the camera to a firm support.

Battery Compartment: The cells giving power to the camera are here.

Power Switch: It is used  to turn the camera on or off.

Indicator LED: To show the status of the camera

LCD panel: LCD screens are behind the body and they can be of different sizes. On a digital compact camera, the LCD has generally started to completely change viewfinder. On DSLR, LCDs are primarily for viewing photos after the shoot, but now some cameras also have "live mode".
Display control / Menu button: To control the information shown in the LCD and the menu.
Picture Review: Press this button to review the picture you've already taken.

Cursor Pad: Navigate to the menu option.

Exposure Compensation Button: If you want to control the aperture, then you have to press this button.

Set / Execute Button: It is used to set the menu option in the current selection.

Memory Card Slot: In this slot we insert the digital memory card.

USB Port: for USB cable.

File-save LED: This light usually indigitated that an image memory card is being saved.

Parameters of a Digital Camera: The parameters decide the clarity of the image.

1) Aperture: Aperture refers to the opening diameter in the camera. It can also be set in manual mode. Professional manual mode, because they can bring their personal touch on the image.

2) Shutter Speed: It refers to the volume of light passing through the aperture. It can only be automatic. Aperture and shutter speed both play an important role in creating a good image.

3) Focal Length: This is the distance between the lens and the sensor. It also depends on the size of the sensor. If the size of the sensor is small, the focal length is also less.

4) Lens: Four types of lenses are used primarily for digital cameras. They vary according to the cost of the camera, and also adjust the focal length. They are

i) Fixed-focus, fixed-zoom lens
ii) Optical-zoom lenses with automatic focus
iii) Digital zoom
iv) Replaceable lens systems

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