 |
|
|
|
|
How a Digital Camera Works
The digital camera is not something of a magic box that came out of the blue and made wonders! The digital camera is very much like the conventional analog camera, but the technology has been altered. It also contains most of the associated components that the conventional camera contains, like lens and a shutter for letting in light, however instead of reaching a photosensitive film, the light is made to fall upon array of image sensors or photosensitive cells. Much of the differences are like this, yet most of it still remains in oblivion for the ordinary people. And it order that the digital camera gets its true respect, it is necessary to explore these areas of truth and reveal them in light. Looking a bit more in details about the working of the fantastic device, the digital camera. As a continuation of the above lines, it can be further investigated that the sensor array is basically a microchip about 10 mm across. Every image sensor is a charged-couple device (CCD) converting light into electric charges, and is essentially a silicon chip used to measure light. These charges are stored as analog data that are then converted to digital via a device called an analog to digital converter (ADC). Over the chip are present a collection of very small light-sensitive diodes, named photosites, or pixels that convert light (or more scientifically, photons) into electrical charges called electrons. The pixels are very much light sensitive, therefore with brighter light striking them, produces greater build up of electrical charges. Each 1000 array receptor creates 1 pixel, and every pixel corresponds to some information stored. The light enters the digital camera via the lens, which is the same mechanism as the conventional analog camera. And this light hits the CCD when the photographer presses the shutter button. The shutter opens and thereby illuminates every pixel, however with various intensities. Taking a look apart, it can be observed that quite a few digital cameras use CMOS (meaning complementary metal oxide semiconductor, a technology of manufacturing these microchips) technology based microchips as image sensors. The basic advantage is that the CMOS sensors are appreciably cheaper and simpler to fabricate than CCDs. Another great advantage from CMOS sensors is that these take very less power compared to other technology, which adds up to the fact as to their extensive use, and can thus even support the implementation of additional circuitry on the same chip like ADC, some control units etc. Thus it can be stated that CMOS technology based cameras are small, light, cheap and also energy efficient, yet at the cost of some amount of image quality. However the common trend remains that all cameras of the mega pixel range and higher up use CCD chips instead of CMOS. This is because of the fact of picture quality only, leaving aside the price differences. This is basically the fact about how digital cameras work! Having known this much difference would not come in the photographing expertise of the users, but it always feels a kind of satisfaction on understanding the inner depths of a device that is so close to the eyes! About The Author Jakob Jelling is the founder of http://www.snapjunky.com. Visit his digital camera guide and learn how to take better pictures with your digicam.
MORE RESOURCES:
Vikings player says his contract barred use of diuretic like one at issue in ... - Gaea Times (blog)
Google News |
|
|
|
RELATED ARTICLES
Crooked Horizons in Your Photos? - Here is a Five Minute Digital Fix Remember the good old photography days?Film camera in hand, you would see that perfect landscape, seascape or sunset and shoot off several shots.Perhaps a couple of weeks later, once you had returned home and finally finished that 24 or 36 exposure film, it was off to the photo-lab to get the film processed. Infrared Photography and Big City Crime One of the major problems of the larger cities of the word these days is crime. It appears that the larger the city the more-acceptable serious crime seems to be. Where Do Great Ideas Come From? At a Photo Club meeting I attended recently, the President made a comment on another meeting he had attended, where someone in the audience asked the presenter where to find good subjects to photograph. The presenter in question started giving specifics instead of identifying the core issues in question, Attitude and Perspective. 9 Tips For Taking Great Digital Photos IntroductionModern cameras are highly automatic in operation. They have auto focus and auto exposure. How to Create a Family History Video Memoir with Photos and Interviews of Your Loved Ones Here are examples of two basic videos you can create quickly on a great budget:Example A - Do-it-yourself for around $125 + extra copies1. The interviewRent a digital video camcorder or if you have one already, use it. Basics of Photography Understanding light is one of the very basic principles of learning to be a photographer. When you have a group of people in front of you with smiling faces ready for you to say 'cheese' or if you are taking a shot of a scenic area, the most important consideration is the light factor. How to Take Great Photos of Your Child Children are naturally photogenic. Ive worked in studios and children are so easy to photograph. Black & White Photography Photography is a diversified field of creating a spectral variety of art. It is a specialization that deals with different experimentations with colors, however it is also a fact that only shades of black and white can also do wonders in this zone of creative art. Types of Digital Cameras If you are in the market to purchase a digital camera, you have surely seen several different types of cameras. It isnt exactly clear what the differences between the types are, and it can be confusing trying to choose the digital camera thats right for you. Photography Workshops and Master Classes Several years ago, I met a fellow photographer - albeit, he was an amateur, a very good one (the difference is not the quality of the work . the difference is that one does it for love, the other does it for money). Extreme Digital Photography: Beyond Point-and-shoot When my old Olympus digital camera got broke while caving during a family camping trip, I had mixed feelings. For quite some time I had felt that the quality of some of my pictures was hampered by the limitations of that camera, but I did not look forward to spending the money on a new one. Photography Has No Gender Women photographers are fortunate. Unlike other titles, photographer has no gender. Start Up a Nude Photography Business There are major obstacles to overcome to get into nude photography, not least of which is the need to practise technique. By its very nature there has to be at least one subject, and the big problem for the photographer here is image. A Guide to Underwater Camera Cases If you are buying a new underwater camera or video camera, you will need an underwater camera case. And this case needs to be watertight, airtight, dustproof, crush resistant and designed to keep your valuable equipment safe from all the elements. Birthday Party Photo Tips - How to Make Yours Truly Stand Out How many of the birthday party pictures you've seen are kept just because they are of someone's birthday, not because it is inherently a terrific photograph?When was the last time you heard anyone exclaim: "THIS IS REALLY A GREAT BIRTHDAY PHOTO?" Can you say? NEVER?And yet, birthday parties are happening ALL THE TIME. You would think that "practice makes perfect," wouldn't you; but in this case. Video Camcorder Formats and Media There are way too many tape, disk and stick formats out there:VHS - The old standard, too big, not digital, easily played anywhere without conversion.VHS-C - A small cassette that fits in an adapter to play in a regular VCR. Things You Should Know Before Buying A Digital Camera In a traditional camera, the lens was king. If the lens delivered a decent image, exactly that image would be recorded on the film. Traveling to Europe with Your Digital Camera? The Vacation Season is fast approaching and naturally you will be taking your digital camera along for the journey. After all your vacations are far and few between and it is nice to look back on those memories as you slave away at your job. A Guide to Disposable Digital Cameras Disposable Cameras (also called single-use cameras) first came on the market as film cameras. You would take the entire camera back where you bought it and they would crack it open, take out the film and process it, resulting in photos that were virtually indistinguishable from photos taken with a more conventional camera. How To Avoid Or Reduce Red-Eye Photography with the aid of a digital camera is beyond doubt very fascinating. However, it also has many a nooks that the users of the digital camera must be aware of and also must be well educated to deal with in order to produce good photographs worth the most prized digital camera.
|
| home | site map |
| © 2006 KeralaClick.com |