Digital Cameras (Compact & SLR) Tutorials (Basic) part-1

Introduction - How the camera works - Compact vs SLR - Feature / Function - Before buying camera - After buying camera - Automood picture - Last word

A standard digital camera is no longer a luxury, but an essential component of everyday life. Digital cameras are becoming cheap day by day. A lot of cameras are now available in tens of thousands of taka. Various brands of cameras are becoming day-to-day and new additions and functions are being added. So the users of Decicam are also increasing every day. Writing this with the basic functions and features of compact digital cameras for new / common users and those who want to buy new digital cameras.

How the camera works
Conventional cameras are dependent on mechanical and chemical processes, and through light lenses, through the shorter, the film falls on the film. The film is printed from this film through different steps in chemical processes. The digital camera process is electronic and the light comes in CCD (Charge-Coupled Device) sensor. After that, the digital photo of the whole digital process, then print copy. This digital data of CCD / CMOS is possible to be used on all types of digital devices.

Compact vs SLR
Digital cameras can be divided into roughly two categories. Shoot and Point (Compact) and SLR (Single Lens Reflex). Most functions in a compact camera are automatic, which allows the camera itself to be customized in its own program. Users can set up these functions in SLR itself, but users must have good knowledge about camera and photography. The size, weight, and price of the SLR camera are more than compact cameras, and there is also the option of different lenses and flush access. In one word SLR camera is for professional photographers. This article is for general users, so here's just a compact digital camera.

Important features / functions of digital cameras

1. CCD (Charge-Coupled Device): CCD digital camera is a silicon chip where the picture is recorded. CCD or CMOS sensor is the most important and expensive device for digital cameras. It's made up of millions of pixels. When light comes through the lens and hits the sensor's photo layer, then an electric charge is generated in the pixels below that layer. There are different types of electric charges for different pixels based on the amount of light. A digital picture is created in conjunction with the equivalent of million pixels.
   CMOS Sensor

Megapixel, which is the digital sensor resolution, means the power of the camera's sensor. The more printed magazines you can take out, the image quality can be kept intact. Recently many people consider this megapixel camera status symbol! Tunecart size photo is 6 "x4". Apart from the exceptional need, no one prints bigger than this. 7 "x5" 3 megapixel cameras are enough for photo quality prints!

Print size

1. Lens: Lens is the second important device of the digital camera. Nikkon, Canon, Olympus companies themselves produce lenses, again Sony, Casio, Panasonic companies use third-party lenses.
   
2. Zoom: The important features of the zoom power lens on the lens. 'Zoom in' means to draw the object in the distance with the help of a lens, and 'zoom out' means to push the object close to the view with the lens. Two types of zoom: Optical zoom and digital zoom. Lens using the camera for optical zooming. That means, with the help of lens, make the object smaller, where the quality of the picture is the same. There is no relation between objects or lenses with digital zoom. Here, in the digital process, any part of the picture is shown bigger and the quality of the picture is reduced. Example: The more zoomed into the image in the graphic program, the picture becomes blurred.

Optical Zoom

So be careful, do not be prompted by the digital zoom of the camera, notice how optical zoom power is. The more zoom, the more pictures you can take. Optical zoom power is often released by focal length. Such as: 5.8-17.4mm, 35-105mm etc. Optical zoom power out of the last number divided by the first number. 105/35 = 3 That means 3X Optical Zoom. In literal sense Focal Lent is the distance from the lens to Sensor.

1. Focusing Range: Focusing Range is published from what lenses and how close objects can be taken. Most cameras can take pictures of infinite distance objects, so the number of nearby objects (macro) can be significant. Eg: 1.6 ft (0.5 m) to infinity (wide), 3.28 ft (1.0 m) to infinity (telephoto), 8 in. (0.2 m) (close-up) etc.

2. Aperture: The Aperture term is used to refer to how open the lens is iris diaphragm. To control the flow of light through the lens, the Aperture small / enlargement of the iris diaphragm or round shape. Increasing the amount of light entering the lens is reduced. Different sizes are indicated by f / # numbers. The larger the number of stars, the smaller the way to enter the light.
   

3. Shutter Speed: Shutter is called between the lens and the sensor. It works to trap the light. It has to be opened for access to the light sensors coming through the lens. With the Shutter release button pressed when the photo is taken, the shutter will open again for a few minutes. The shutter speed is the time to open the lens and the ceiling of the sensor (shutter) and time gaps to stop. That is to control how long the cover will be open. Typically this time is less than a second, in some cases it may be more. Shutter speed is released as 1/90, 1/125, 1/250, 1/500, 1/1000, 1/1500 seconds. Aperture and Shutter Speed ​​are different for night and day pictures.

4. Exposure Control: Aperture and Shutter Speed's precise coordination can make beautiful pictures possible. If the correct combination of shutter speed and aperture is not correct, then the picture will be "over exposure" (more bright) or "under exposure" (more black). Generally, professional photographers photographed Aperture and Shutter Speed ​​manually. Compact cameras automatically control these automatic modes. But it may not always be perfectly accurate.