Before an actual image is recorded, a number of measurements are taken by the camera as you press on the shutter release. It figures out the focus to ensure a sharp image, and it measures the available light to determine the aperture (a hole within the lens, which size can be adjusted) and shutter speed needed to record the image.
When you press the shutter release all the way, here's where the magic begins. The aperture would jump to whatever setting the camera (or you) decided to use, and the shutter opens to allow light to reach the sensor.
The time the shutter remains open (ie. shutter speed) and the size of the aperture will both determine how much light reaches the sensor. For example, your camera would need a larger aperture and longer time to record an image in a dim room (the latter is the reason why photos taken in the dark without flash tends to be blurry. Your hands would be shaking the whole time and the camera records all that motion) compared to broad daylight.
The sensor itself is either a CCD (Couple-Charged Device) or CMOS (Complementary Metal Oxide Semiconductor) microchip. What this means is unimportant.
These sensors are made of an array of tiny squares, usually blue, green and red arranged into a mosaic pattern, called pixels. Of course, there are exceptions (like Fuji, which have hexagonal pixels in some of their camera sensors, and Sigma, which stacks all three colours instead of arranging them side-by-side).
You can think light as very tiny packets of energy. A stream of packets of energy. These packets are called photons. When they hit a pixel, it creates a small electrical current is generated. The more light, the more current. These electrical signals are amplified (to make the signal stronger) and are converted into digital signals by the ADC (Analog/Digital Converter).
Once that's done, a microprocessor processes your image. It sharpens the image, increases the contrast, maybe make it black and white if you like, and perhaps add a date stamp. The processes here are many and varied, but it ends with packaging the file into a smaller size (usually a JPEG file) and sends it to the memory card. You can now switch to playback mode, show it to your friends, and laugh at how silly you look during that last Halloween party.
Some cameras (typically more expensive ones) also have a separate, small, temporary, but very fast memory called buffer memory. It stores the image while its slowly being recorded into the memory card, so you can shoot another picture right away instead of waiting for it to finish recording. Sports photographers are especially dependant on this feature to record the heat of the action, often at anywhere between 5 to 10 pictures EACH SECOND!
I prefer film cameras to digital cameras. The pictures look better.
I use alkaline batteries in my Olympus 2009 camera.
True
Film cameras are alot better quality then digital cameras.
. Professionals mainly use the SLR type of digital camera and sometimes use "digital backs". As for makes, my personal opinion is to go with either Canon or Nikon cameras. .
"Yes, they do. They have a wide variety of Kodak Easyshare cameras, from kits including the camera as well as other accessories (such as a memory card, a case, a tripod, etc.) to professional use cameras to basic digital cameras perfect for casual use."
Yes, there are many websites that have digital cameras for kids. Kidsdigitalcamerasite.com is a website that sells digital cameras for kids that are easy to use and handle.
The genre says your answers where it says Digital Cameras, Cameras.
An SD card.
Film cameras
You can compare prices of digital cameras at pricegrabber.com and type in digital cameras.
There are many digital cameras that are available to use and purchase. For example, brands such as Sony or Nikon sell a range of cameras in digital form.
No. You can't use it on Canon's autofocus film cameras either.
Taking pictures, mostly.
Most, but not all, digital cameras will record videos.
Most of the new digital cameras use SD card for image storage
Digital cameras are a fusion of electronic components. Electronics is an extension of one of the four fundamental forces in the universe, and that force is the electromagnetic force. Any time we talk about electricity or electronics, we are actually talking about the electromagnetic force. Do digital cameras use electromagnetism? Yes, they do.