Digital Zoom Versus Optical Zoom
The digital camera is but a technological advancement of the conventional analog camera. And thus every component of the analog camera must have been upgraded or changed to bring in some improvisations. This discussion is an effort to unravel alteration and make one comparison between what was and what is! This discussion is thereby focused upon a very critical component of a camera (analog as well as digital), the zoom!
Before making a comparison it is important to discuss the significance of the subject matter, in this case the zoom. Well a zoom lens has more than a few portable glass components inside it. By adjusting these components, the focal length of the lens can be altered. Modifying the focal length alters the view distance as well as reduces the field of view, thereby making the projected image to appear larger.
It must me noted that both the optical zoom and the digital zoom are components that are used to magnify an image, but they work in fundamentally different principles and acquiesces drastically different results. In general, optical zooms always produce a far finer and advanced image than digital zoom.
Looking at the functions of these zooms, in digital cameras that offer optical zooms function the same way similar to a zoom lens of a conventional analog camera. A conventional lens works by accumulating light rays that are projected over a portion of a film, and in this case of a digital camera optical sensor. The distance of the lens from the focus point where all of the light rays converge is known as the focal length of the lens. Unlike the optical zoom, the digital zoom works by ranging the pixels in the ultimate image after the image has been captured. The fact remains that the same number of pixels are collected when the photograph is magnified. The only thing that alters is the light rays that are projected over the optical sensors to figure out those pixels.
It is a common intuition that optical lenses are far better than the digital zooms. The reason is that the digital camera zooms are more prone towards computer applications in them rather than mostly human interactions and expertise. Yet, it also remains a fact that beginner photographers find it more useful to handle a digital zoom and also its computer friendly nature. There the computer does the intricate tasks of finding some levelheaded approximation of colors that pixel might take up as it had captured the images or photographs. Many algorithms are existent in this area, but perhaps the most abundantly used algorithm involves looking at the pixels that are quite nearly like neighbors and come up with a kind of an average. Anyways the process remains too complicated and its end result is what the digital zoom users are interested in.
Thus the ultimate truth remains that it is useless to compare digital zooms with optical zooms. Perhaps it is more logical to compare optical zoom with optical zoom and digital zoom with digital zoom. Both these two types of zooms, the optical as well as the digital, have some good and bad qualities. Both of them have some extra features and preferences over the other. And thus it is not wise to compare them, even though a comparison may exist. The efforts would then perhaps look like comparing oranges with apples!
About The Author
Jakob Jelling is the founder of snapjunky.com. Visit his digital camera guide and learn how to take better pictures with your digicam.
How to Create a Great Video - a Simple Guide on How to Shoot Home Movies with a Camcorder
So you have bought a camcorder and have shot some footage, but truthfully you don't much like the results. Maybe I can help.
Picture Framing for Photographers - Part 1
Imagine being able to frame all your own photographs just as well as a professional. You can save enough money to easily pay for all the necessary tools, and the convenience of being able to do it yourself frees you from having to get someone else do it.
The Truth About Pixels, Part 2-1: Printing 4x3 Inch Photos
Why is a 3 megapixel camera better than a 1 megapixel camera? It really depends on how you intend to reproduce the picture. The reason cameras produce pictures at 72 pixels per inch is that this format is standard in video uses such as television and DVD.
Digital Image Files - Megapixels, Megabytes, or DPI?
When I promised readers that I was going to do an article on this topic I was scared. For two reasons - firstly, it's a HUGE subject.
Photography 101 Part 1
Photography 101 Part One Equipment: camera, meter, flash, tripod This article is a simplified photography course directed at new photographers out there who want to know where to start. If you really want to learn photography the first thing you need is a good affordable and reliable camera.
The Photography Portfolio: Building Your Reputation
If you have hopes of becoming a professional photographer, or even just of trying to get your work published in a public forum, you will need to create a photography portfolio. So what's so important about a photography portfolio anyway?There are many reasons why having a portfolio of your work available for others to view.
Weddings, From a Photographers Point of View
Your wedding day is without a doubt one of the happiest and stressful days of you life. The happy part comes naturally but how can you cut down on the stress? Well from a photographers standpoint, seeing that he is with you from the beginning of the day till the end, and sees you before and after the wedding, I would like to offer some tips and secrets to make it more happy than stressful.
Photography Business: Taking Baby Photos - for Professionals & Families
Babies make the best and the worst subjects to photograph. They are the best for two reasons, people are more tolerant at looking at baby photos, as well as the fact that babies are not aware their image is being captured, and therefore they do not tend to put on the "camera face" so typically used by elder children and adults.
Understanding Digital Photography
Most serious photographers and all professionals use a Single Lens Reflex camera (SLR), the definition of an SLR camera is that the image is captured exactly as you see it in the viewfinder. However there are now two types of SLR the single lend reflex film (SLRF) and the single lens digital (SLD).
Creating Personalized Photo Calendars
About Personalized Photo Calendars:Photo Calendars are 12-month, wall-hanging calendars that you can create using your own digital photos and captions. As you customize your own photo calendar, you can start the calendar on whatever month and year you wish.
Underwater Digital Cameras
Underwater photography's is primarily focused towards entertaining and informing the people and the users themselves about what is happening in the world of under water with the aid of photography. The advent of digital cameras has opened up new horizons for such ventures.
Modeling Portfolio Webites
In the age of home phones and 8x10's we all wondered how anyone could ever afford to get into the modeling industry. Even after you invest a small fortune in professional training and other peripheral services, you still have to purchase all of the marketing materials to send to anyone with a mailing address.
10 Steps to Buying a Digital Camera You Must Know
You are anxious to purchase your new digital camera! You want to get it in your hands quickly so you can begin to enjoy it. Are you going to go to the store right now and pick one out? Wrong! You must have some basic knowledge and know-how prior to entering into the world of salesmen and digital cameras! Here are the steps to buying the digital camera that is right for you.
Camcorder Techniques: How To Make Home Movies Your Family And Friends Will Be Excited To Watch
Pre-Production:It's all got to start somewhere, so before you even charge your batteries, rewind those tapes or pack the car, take a seat and have a good think about what you are planning to shoot with your camcorder. 'Planning is the key' to a good production even if you're just shooting a small home movie.
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.
How Many Megapixels Do We Need?
Are you having megapixel envy each time you walk by the camera section of your favorite electronics store? So do I. But, do we really need more and more pixels? The answer depends on what we intend to do with the images.
Buying Your Child A Digital Camera - What You Need To Know
Purchasing any gift item for your child is a mind-numbing task. You can never be sure whether they will like what you buy for them or not.
How To Reduce Red Eye The Easy Way With Any Pro Or Point & Shot Camera
There is one simple technique any body can do to eliminate red eye. It can be done with any type of flash on any camera because red eye only happens when using flash.
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.
10 Things You Can Do to Protect Your Photographs from Infringement
While it would be nice to live in a house where you don't have to lock the door, it's not practical these days. Likewise, here are 10 things you can do to help safeguard your images from being stolen.
|home | site map|