Digital Camera Works
How Does A Digital Camera Work?
Author: James Dawson
Before getting to see how a digital camera works, let’s begin by saying that a digital camera differs from a classical one primary through its storage capabilities. Imagine that using your old classic 35 mm camera you could make “n” pictures (for example 36) on a film before having to stop making pictures and change the film.
This inconvenient is no more present with digital cameras because you have so much space available that you could do several hundred pictures before having to empty your card and if this thing is annoying imagine a portable drive with so much space that you even forget the meaning of “spaceless”. Here is how a digital camera works.
Until now we concluded that the biggest difference between classical cameras and digital ones is “available space” but is this all? The answer is a simple NO; I suppose you heard many times the word mega pixel when speaking of digital camera, but what is it? A digital camera works on the basis of stimuli that an incorporated sensor receives.
In a digital camera the light excites a digital sensor which is a very small computer; this sensor is composed of millions of tiny sensors called “pixel”, a pixel means “picture elements”. It is on due to pixel structure that a digital camera works.
These many small sensors make up a sort of table that has a vertical and horizontal length, so if I say that my camera has “N pixels width * M pixels height = K” this number K is the “Megapixel that we’ve heard so many people speak about”. So is this all the mechanism that shows how a digital camera works?
So mega pixels are made of millions of small dots, so more pixels means more mega pixels, hence means a higher quality picture, but a more expensive camera. After the light has reached the sensor it goes through several filters until it becomes a digital signal. This doesn’t tell us all about how a digital camera works.
Another set of filters is applied for white balance, color and aliasing. At the end of this process the image is made as small as possible with a technique of “erasing” unnecessary pixels. Next the image gets into the buffer, and when the buffer has completed loading the image it writes it on an external memory like a card. Basically this is the secret of how a digital camera works.
Now I will tell you a few words about the “legendary” zoom that usually makes the difference between a cheep and an expensive camera. The digital zoom is a “fake” zoom because it simply enlarges the pixels that make up the photo so … you can’t imagine the result.
How does a digital camera zoom work? An optical zoom is a different thing, because you can change the “field of view” for widening out for a landscape photo or zoom on for a nice portrait. All this is realized by moving the lens elements to change the focal length. So if you like to take nice photos look for the optical zoom, remember that the digital one is just for the seller to tell you that it’s not such a bad deal to buy a camera that has a zoom of 5. Always ask and test how the digital camera works.
About the Author:
If you want to find out more about
digital photo printing
please visit
http://www.digitalphotoprintingcritic.com
Article Source: ArticlesBase.com – How Does A Digital Camera Work?
Digital Camera Tips : How a Compact Digital Camera Works
|
|
Keurig B70 Platinum Brewing System $229.99 The Elite Brewing System is Keurig’s gourmet home brewing made affordable. The Elite Brewing System, the most affordably priced Keurig kitchen brewing system, offers K-Cup® coffee, tea and hot cocoa brewing as the elite choice to any drip coffee maker. The Elite offers two cup sizes for brewing options with the programmable feature of Auto Off. The 48-ounce removable water reservoir holds up to 6… |
|
|
Cuisinart DCC-1200 Brew Central 12-Cup Programmable Coffeemaker $165.00 A striking blend of retro style and modern technology. Programmable for brewing up to 24 hours in advance. Setting for 1 to 4 cups ensures full-bodied flavor and aroma. BrewPause™ feature lets you enjoy a cup before brewing is finished. Adjustable heater plate setting keeps coffee at the temperature you prefer. Audible “ready” signal. Automatic shutoff. Includes Gold Tone metal filter, #4 pap… |
|
|
Mr. Coffee Programmable Coffeemakers Set the Delay Brew feature up to 24 hours in advance and get ready to wake up to a freshly brewed pot of hot, delicious coffee. This coffee maker also offers Pause ân Serve capability, allowing you to pour a cup of coffee while the coffee maker is still brewing. And the Removable Filter Basket makes cleanup quick-and-easy…. |
|
|
Wireless IP Pan/Tilt/ Night Vision Internet Surveillance Camera Built-in Microphone With Phone remote monitoring support(Black) $46.88 Specs: Image Compression Format: M-JPEG standard Image Resolution: VGA(640×480) / QVGA(320×240) Sensor: 1/4 inch CMOS, 300,000 Pixels Light frequency: 50Hz, 60Hz or Outdoor Audio compression: ADPCM Data rate: 802.11b: 11Mbps (Max.), 802.11g: 54Mbps (Max.) Ethernet: One 10/100Mbps RJ-45 Viewing angle: 67? Horizontal Rotating Angle: 0~270? Vertical Rotating Angle: 0~120? Alarm Mode: motion detection… |
|
|
Honeywell RCWL300A1006 Premium Portable Wireless Door Chime and Push Button $31.94 The Honeywell RCWL300A P3 Premium Portable Wireless Door Chime and Push Button makes it easy to replace your home’s generic doorbell ring with a chime tune that better fits your individual style. This chime is also compatible with a wide range of optional security accessories that can help you safeguard your home and family, and it comes complete with a pre-programmed bell push button. .caption … |
|
|
Bionaire BW2300 Twin Window Fan with Remote Control $45.15 Bionaire 9″ 3-spd. Electronic Twin Window Fan w/Remote… |
|
|
Introduction to the Canon 5D Mark II/50D, Vol. 2: Advanced Topics $29.99 Take great pictures with your Canon 5D Mark II or 50D Push your creativity to the limits; create photographic images that up until now have existed only in your imagination This guide takes you through Canon’s advanced features, and explains what they are, how they work, and how they can perform in real-world situations. Custom Functions: The 5D and the 50D are endlessly configurable. We go into d… |
|
|
Understanding the Canon Speedlite 580EX II/430EX II $19.94 This DVD uses the same material as our original 580 EX/430 EX DVD. Demonstrations of Speedlite operations have been updated to show the 580 EX II/430 EX II models. Your new EX II Speedlite from Canon can be the most powerful accessory in your camera bag! Understanding how the Speedlite’s controls work is important, and this DVD takes you through its operations, step by step. Your host, Tim Mantoa… |
|
|
Introduction to the Nikon D300/D700, Vol. 2: Advanced Topics $29.99 REGION FREE DVD developed for new to intermediate photographers buying their first DSLR cameraCreates a solid understanding of the camera’s features and controls and helps to unleash its potentialSample subjects are: shutter priority aperture priority/depth of field focus alternatives metering and bracketing and many more. Topics are arranged in chapters so users can move at their own pace and ret… |
|
|
Duracell Pre-Charged Rechargeable Batteries Ideal For Digital and High Drain DevicesRechargeable ~ Pre-Charged ~ Stays Charged Longer ~ Recharge Less*Pre-charged and ready to use, straight out of the pack Retains power for up to 365 days while not in use, unlike other rechargeables Can be recharged 100′s of times Longer lasting in high drain devices, than ordinary alkaline batteries No special battery charger required (Duracell Chargers Rec… |
