Archive for the ‘Digital Photography’ Category

Affordable Digital Cameras

Sunday, December 28th, 2008
digital cameras
mike legg asked:

Many of us look for digital cameras that can perform the tasks that we need while being priced at reasonable rates. The various digital cameras can be found in the high end market to the mid range and also affordable digital cameras. When you are looking for the affordable digital cameras that you need for your photographs you will find many different types of cheap digital cameras that you can buy.

These different affordable digital cameras can be bought from a variety of camera stores. The price range from some of these cameras can start at about $30 and go as high as $500. The various cameras that can you find in this cheap digital camera market also have well known brands like Nikon, Minolta, JVC, Kodak and Fuji.

While these affordable digital cameras will lack some of the features that can be found in the high end digital cameras they can deliver good photographs. You will need to look at these cheaper digital cameras to see if they have the various items that you require.

These features can be the various shooting modes that you will get from your digital camera. Underwater, foliage, indoor, portrait, automatic are just a few of the shooting modes that you can look for when you are selecting your affordable digital camera. Some cheap digital cameras will feature interesting effects like that of panorama stitching.

This facility allows you to take three different photographs. You can them merge these distinct photographs together to create a fantastic picture. The amount of megapixels may not be that important for everyone but they do allow you to receive sharp and well defined pictures.

Since this is important for accurate and detailed photographs you should look for this information as you are going through the various types of affordable digital cameras that are available. You can use various photography magazines and digital camera buyer’s guides to help you select the type of digital camera that is within your budget.

Since there are many different models of affordable digital cameras you will need to know the various features and requirements that you need for taking a picture. Once you know these parameters you can start your hunt for the right type of digital camera. With so many different brands and models of digital cameras on the market you are sure to find your ideal and affordable digital camera.

Digital Camera Basics-resolution, Exposure, Focus, and Storage

Wednesday, December 17th, 2008
digital cameras
Brian Lee asked:

Resolution

The amount of detail that a camera can capture is called the resolution, and it is measured in pixels. The more pixels a camera has, the more detail it can capture and the larger pictures can be without becoming blurry or “grainy.” High-end consumer cameras can capture over 12 million pixels. Some professional cameras support over 16 million pixels (megapixels), or 20 million pixels for large-format cameras. For comparison, it has been estimated that the quality of 35mm film is about 20 million pixels.

Exposure and Focus

Just as with film, a digital camera has to control the amount of light that reaches the sensor. The two components it uses to do this, the aperture and shutter speed, are also present on conventional cameras.

Aperture: The size of the opening in the camera. The aperture is automatic in most digital cameras, but some allow manual adjustment to give professionals and hobbyists more control over the final image.

Shutter speed: The amount of time that light can pass through the aperture. Unlike film, the light sensor in a digital camera can be reset electronically, so digital cameras have a digital shutter rather than a mechanical shutter.

These two aspects work together to capture the amount of light needed to make a good image. In photographic terms, they set the exposure of the sensor.

In addition to controlling the amount of light, the camera has to adjust the lenses to control how the light is focused on the sensor. In general, the lenses on digital cameras are very similar to conventional camera lenses — some digital cameras can even use conventional lenses. Most use automatic focusing techniques.

The focal length, however, is one important difference between the lens of a digital camera and the lens of a 35mm camera. The focal length is the distance between the lens and the surface of the sensor. Sensors from different manufacturers vary widely in size, but in general they’re smaller than a piece of 35mm film. In order to project the image onto a smaller sensor, the focal length is shortened by the same proportion.

Focal length also determines the magnification, or zoom, when you look through the camera. In 35mm cameras, a 50mm lens gives a natural view of the subject. Increasing the focal length increases the magnification, and objects appear to get closer. The reverse happens when decreasing the focal length. A zoom lens is any lens that has an adjustable focal length, and digital cameras can have optical or digital zoom — some have both. Some cameras also have macro focusing capability, meaning that the camera can take pictures from very close to the subject.

Digital cameras have one of four types of lenses:

1) Fixed-focus, fixed-zoom lenses – These are the kinds of lenses on disposable and inexpensive film cameras — inexpensive and great for snapshots, but fairly limited.

2) Optical-zoom lenses with automatic focus – Similar to the lens on a video camcorder, these have “wide” and “telephoto” options and automatic focus. The camera may or may not support manual focus. These actually change the focal length of the lens rather than just magnifying the information that hits the sensor.

3) Digital-zoom lenses – With digital zoom, the camera takes pixels from the center of the image sensor and interpolates (alters) them to make a full-sized image. Depending on the resolution of the image and the sensor, this approach may create a grainy or fuzzy image. You can manually do the same thing with image processing software — simply snap a picture, cut out the center and magnify it.

4) Replaceable lens systems – These are similar to the replaceable lenses on a 35mm camera. Some digital cameras can use 35mm camera lenses.

Storage of Images

Most digital cameras have an LCD screen so you can view your picture right away. This is one of the great advantages of a digital camera — you get immediate feedback on what you capture. Of course, viewing the image on your camera would lose its charm if that’s all you could do. You want to be able to load the picture into your computer or send it directly to a printer. There are several ways to do this.

Although most of today’s cameras are capable of connecting through serial, parallel, SCSI, USB, or FireWire connections, they usually also use some sort of removable storage device. Digital cameras use a number of storage systems. These are like reusable, digital film, and they use a caddy or card reader to transfer the data to a computer. Many involve fixed or removable flash memory. Digital camera manufacturers often develop their own proprietary flash memory devices, including SmartMedia cards, CompactFlash cards and Memory Sticks. Other removable storage device include floppy disks, hard disks (external, or microdrives), and writeable CD’s and DVD’s.

Regardless of what type of storage they use, all digital cameras need lots of room for pictures. They usually store images in one of two formats — TIFF, which is uncompressed, and JPEG, which is compressed. Most cameras use the JPEG file format for storing pictures, and they sometimes offer quality settings (such as medium or high).

To make the most of their storage space, almost all digital cameras use some sort of additional data compression to make the files smaller. One compression routine takes advantage of patterns that repeat. The image can be reconstructed exactly as it was recorded, reducing the file size no more than 50%, often much less. Another compression routine called irrelevancy eliminates some of the more meaningless data, taking advantage of the fact that digital cameras record more information than the human eye can easily detect.

Digital Camera Basics-images

Saturday, December 13th, 2008
digital cameras
Brian Lee asked:

In the past twenty years, most of the major technological breakthroughs in consumer electronics have been built around the same basic process: converting conventional analog information (represented by a fluctuating wave) into digital information (binary information represented by ones and zeros, or bits). This fundamental shift in technology has changed how we handle visual and audio information — it completely redefined what is possible.

The digital camera is one of the most notable examples of this shift because it is so truly different from its predecessor. Conventional film cameras depend entirely on chemical and mechanical processes — you don’t need any electricity whatsoever to operate them, other than for a flash. On the other hand, all digital cameras have a built-in computer, and all of them record images electronically.

The new approach has been enormously successful. Since film usually provides better picture quality, digital cameras have not completely replaced conventional cameras. But, as digital imaging technology has improved, and prices dramatically decreased, digital cameras have rapidly become more popular.

In this article, we’ll find out exactly what’s going on inside these amazing digital-age devices.

Understanding the Basics

Let’s say you want to take a picture and e-mail it to a friend. To do this, you need the image to be represented in the language that computers recognize — bits and bytes, or binary information. Essentially, a digital image is just a long string of 1s and 0s that represent all the tiny colored dots — or pixels — that collectively make up the image. If you want to get a picture into this form, you have two options:

1) You can take a photograph using a conventional film camera, take the film to a developing lab that processes the film chemically, prints it onto photographic paper, and then place the picture on a digital scanner to sample the print (record the pattern of light as a series of pixel values).

2) You can directly sample the original light that bounces off your subject, immediately breaking that light pattern down into a series of pixel values — in other words, you can use a digital camera.

At its most basic level, this is all there is to a digital camera. Just like a conventional film camera, it has a series of lenses that focus light to create an image of a scene. But instead of focusing this light onto a piece of film, it focuses it onto a semiconductor device that records light electronically. A computer then breaks this electronic information down into digital data. All the fun and interesting features of digital cameras come as a direct result of this process.

Instead of film, a digital camera has a sensor that converts light into electrical charges.

The image sensor employed by most digital cameras is a charge coupled device (CCD). Some cameras use complementary metal oxide semiconductor (CMOS) technology instead. Both CCD and CMOS image sensors convert light into electrons. Without getting too technical, a simplified way to think about these sensors is to think of a 2-dimentional array of thousands or millions of tiny solar cells.

Once the sensor converts the light into electrons, it reads the value (accumulated charge) of each cell in the image. This is where the differences between the two main sensor types become a factor:

A CCD transports the charge across the chip and reads it at one corner of the array. An analog-to-digital converter (ADC) then turns each pixel’s value into a digital value by measuring the amount of charge at each photosite and converting that measurement to binary form. CCD sensors create high-quality, low-noise images. CCD sensors have been mass produced for a longer period of time, so they are more mature. They tend to have higher quality pixels, and more of them.

CMOS devices use several transistors at each pixel to amplify and move the charge using ordinary wires. The CMOS signal is digital, so it needs no ADC. Because each pixel on a CMOS sensor has several transistors located next to it, the light sensitivity of a CMOS chip is lower (many of the photons hit the transistors instead of the photodiode.) CMOS sensors traditionally consume little power. CCDs, on the other hand, use a process that consumes lots of power.

Resolution

The amount of detail that the camera can capture is called the resolution, and it is measured in pixels. The more pixels a camera has, the more detail it can capture and the larger pictures can be without becoming blurry or “grainy.” High-end consumer cameras can capture over 12 million pixels. Some professional cameras support over 16 million pixels, or 20 million pixels for large-format cameras. For comparison, Hewlett Packard estimates that the quality of 35mm film is about 20 million pixels.

Exposure and Focus

Just as with film, a digital camera has to control the amount of light that reaches the sensor. The two components it uses to do this, the aperture and shutter speed, are also present on conventional cameras.

Aperture: The size of the opening in the camera. The aperture is automatic in most digital cameras, but some allow manual adjustment to give professionals and hobbyists more control over the final image.

Shutter speed: The amount of time that light can pass through the aperture. Unlike film, the light sensor in a digital camera can be reset electronically, so digital cameras have a digital shutter rather than a mechanical shutter.

These two aspects work together to capture the amount of light needed to make a good image. In photographic terms, they set the exposure of the sensor.

Canon Powershot Digital Camera is a Superior Pro-sumer Product

Saturday, November 1st, 2008
digital cameras
Muna wa Wanjiru asked:


You will find that digital cameras can be used in a variety of situations. These can be functions, weddings, birthdays and even pictures of nature. The Canon digital cameras are suited for these many events. In the Canon range the Canon PowerShot Digital camera has the ability to fulfill this role quite well.

The many Canon PowerShot Digital cameras are about the size of a credit card. The Canon PowerShot Digital camera is considered to be among the smallest digital cameras that have been produced. While this camera is small it still manages to give you high quality pictures.

The Canon PowerShot Digital camera case is made from steel. The exterior appearance of the digital camera is flat fronted. To protect the lens of the camera you will find that this digital camera comes equipped with an automatic lens cover. This cover will protect your digital camera when it is not in use.

Since the camera is made from steel and it has a protective covering for the camera lens you will not have to worry about handling the camera in the worry of something happening to it.

As the Canon PowerShot Digital camera is stylish due to the steel casing which lends it a sense of sophistication you are more likely to take this camera along with you when you go out. This means that you are more likely to take a fantastic photograph with the Canon PowerShot Digital camera.

The various Canon PowerShot Digital cameras all belong to the Canon Digital Elph family. These cameras are all designed to be small is size and yet they give superior performance value.

Most of the digital cameras that are being sold in the world are known by one name like Pentax, Minolta and Kodak digital cameras. The Canon PowerShot Digital camera is however given other names in a variety of countries. These names are Digital Ixus in Europe and South East Asia. In Japan this camera is called the Ixy Digital camera.

The best fact about the Canon PowerShot Digital camera is that it has been designed to merge traditional photography with that of digital photography products. This allows you to take conventional photos without having to worry about setting the cameras to various settings. All that you need to do is to point and click.

The many experts who have reviewed this camera state that the Canon PowerShot Digital camera is a good buy for the average consumer. This digital camera is known to be a superior pro-sumer product.



Finding a Discount Digital Camera

Friday, October 24th, 2008
digital cameras
Matt Peters asked:


If you have a passion for photography but don’t exactly have a lot of cash, finding a suitable camera may be hard for you. Digital cameras don’t come cheap because of the numerous features involved that are lacking in the traditional manual camera. But you don’t have to fret about how much you have to cash out because a discount digital camera is actually available.

A discount digital camera is a camera that is being sold for a lesser price because either it has already gone out of fashion or the manufacturer has already produced a more advanced model. Discount digital cameras come in two kinds – brand-new and used. For some, it is better to buy a specific camera several months to a year after its release because it is cheaper. Though new cameras offer a wider range of features, a discount digital camera offers close to the same features though they can be a bit out of date. You can find discount digital cameras from Discount Camera in the San Francisco Bay area.

Discount digital cameras surfaced when digital cameras broke into the single-use trade. This means that products are used only once and then returned. With a single-use camera, the amount of pictures to be taken is set on a certain limit. After using the camera, it is then sold for a lesser price. The popularity of this market eventually led to the dropping of the prices of newly released cameras. Consumers are predisposed to buy cheaper cameras due to tight budgets. Only avid photographers splurge on highly expensive cameras for better image quality.

The drop of the price point resulted in a fierce competition, which is inevitable in any consumer market. Most manufacturers today compensate through a barrage of advertisements. Features are either highlighted or omitted, depending on the target audience. So it is tasking to select the best digital camera. Even choosing a discount digital camera is difficult. What you have to remember is the reason why you are buying a camera at all. If it is just for recreational use, then you will find a lot of cameras that will suit you. They are relatively cheap compared to high-end professional digital cameras.

When choosing a discount digital camera, you have to check for cuts and scratches if it is used. You also need to measure its performance; image quality, type of battery and media, zoom performance and megapixels. Color sharpness is important in any digital camera. Your only issue with it is choosing the camera with the best image quality that is within your budget. Ensure that the batteries you need aren’t expensive or if the camera needs a special type of battery to be operational. You also have to consider the memory stick or card that comes with your camera. Take into account its compatibility with your equipment. With zoom performance, you only need to check the optical zoom. Digital zoom is equally important but not as much as optical zoom. If your camera has a high optical zoom, this prevents your image from getting broken into minute pixels when you enlarge it. The degree of megapixels assures you of the quality of the image.

To find a discount digital camera, you only have to scope out your local area. By being resourceful, you just need a little cash to support a lifetime hobby.



The New Features of the Canon Eos Rebel Digital Camera

Thursday, October 23rd, 2008
digital cameras
Muna wa Wanjiru asked:


Canon, which is well known throughout the world for its quality cameras, released the Canon EOS Rebel digital camera on August 20th of 2003. At this time there were other well known digital cameras on the market but the new features of the Canon EOS Rebel digital camera made this digital camera well worth looking into.

The various camera experts who have reviewed this Canon camera state that the price tag of $900 makes this a moderately priced digital camera that you can buy in various countries around the world.

If you are looking to buy your camera outside of the United States you might want to be aware of what the Canon EOS Rebel digital camera is called in other countries. For instance the Canon EOS Rebel digital camera will be called the Canon EOS 300D in Europe and in Japan you will hear it being referred to as the Kiss Digital.

For the digital camera enthusiast there is also a Canon EOS Rebel digital camera kit that can be bought. This kit contains an EF-S 18-55 mm 3x lens. The price of the entire digital camera kit is $100, more than the single camera.

The various specifications of the Canon EOS Rebel digital camera include a 6 megapixel CMOS sensor and image processor. The sensor and image processor are housed in the inexpensive plastic body of the digital camera.

To help their customers buy this camera the people at Canon have given the Canon EOS Rebel digital camera a pentamirror instead of a pentaprism. These various modifications have helped to reduce the cost of this camera, which therefore makes this digital camera more affordable.

There are a host of new features that you can find in the Canon EOS Rebel digital camera. These features include contrast, saturation and sharpness settings which can be adjusted for your various needs. There is also a new default parameter setting on the Canon EOS Rebel digital camera which is referred to as Parameter 1.

The Canon EOS Rebel digital camera was the first digital camera to support the use of a new lens called EF-S. The S in the lens’s name stands for short back focus. This lens can only be used with the Canon EOS Rebel digital camera as the other Canon Rebel series cameras will not have the necessary support for this lens.

For the enthusiastic novice or professional photographer, the Canon EOS Rebel digital camera is for you. The many great interesting features and functions to be found on the camera coincide very nicely with the reasonable price tag on it which only makes the camera more appealing.



Beginning Photography Tips, Comparing Different Digital Camera Features

Thursday, October 9th, 2008
digital cameras
mike legg asked:


When we are ready to buy a digital camera we need to look at various facts. These facts will help us to compare digital camera features and eventually decide which digital camera we wish to buy. Using a few beginning photography tips will help us identify the many features that can be present in the various digital cameras as we will need to isolate the main points and features of interest to you.

By narrowing this field of comparison we can look for only the items that will help us take great looking photographs. Among these items to be compared can be the amount of pixels that are offered in each type of digital camera.

To compare digital camera features like this you should have access to a buyer’s guide that will inform you about the amount of pixels that can be found in a digital camera. The higher the amount of pixels will normally mean that your photograph quality will be much better than one with fewer pixels…

You can also compare digital camera features to see if a digital camera is suited for someone who is beginning photography, the amateur photographer, semi-serious photographer, the serious amateur who is looking to better their photographic craft or even professional photographers.

The various information that you can find about digital cameras will let you see what different features are present in a certain digital camera. You will also see when you are looking to compare digital camera features of two or three digital cameras, if these digital cameras have the ability to turn your pictures into sepia, or can be used for black and white digital photography or soft focus pictures with the use of filters.

As you compare digital camera features it is necessary to see what types of shooting modes are present in the digital cameras that you want. There should be indications about the focusing and flash capabilities of different digital cameras like Canon, Nikon, Olympus, Minolta and even Pentac digital cameras.

These beginning photography tips will help you to compare digital camera features that are of a technical nature. There are other sources of information like photography magazines that will let you compare digital features that allow you to take photographs with special effects.

These effects can be how a zoom feature works to give you an unexpected shot from a totally new angle or the way that you can change the focus of a picture by cropping the surrounding areas of your subject.

To take great looking pictures it also helps to have a digital camera that provides you with many different helpful features. The many different sources that you can use like a digital photography magazine, internet articles, and even digital camera buyer’s guides will allow you to compare digital camera features.

Using these few beginning photography tips of comparing the different features of cameras you can select the best type of digital camera that is suited for your needs. To compare digital camera features you need all of these different sources. This way you have a wide choice of digital cameras to look at.



How to Make a Digital Camera Comparison

Sunday, September 28th, 2008
digital cameras
Muna wa Wanjiru asked:


There are, as we know, different brands and models of digital cameras. Before you buy a digital camera you might first want to see if you can make a digital camera comparison. From the results of this comparison you will become aware of the various aspects of buying a digital camera.

In your digital camera comparison there are certain factors which must be looked at thoroughly before you make your final choice for a digital camera. These factors include the matter of handling the camera, the many features that can be found in the digital cameras, and the performance abilities of your chosen camera.

The final factor which needs to be looked into is that of the value for money that you will get from buying a certain camera.

As you look at the first digital camera comparison category, the handling of the camera, you will need to think about various items, and this includes how the digital camera feels in your hands. This means does the camera feel sturdy or poorly made, is it lightweight or heavy.

You will need to note the materials that your digital camera is made from as well in your digital camera comparison. The other item that needs to be looked into is that of the controls and if you can easily read and understand them. You should also be able to get a feeling for the quality of the digital camera from this digital camera comparison.

The next item to be seen to on your comparison test should be that of the many features that you can find with various digital cameras. You should check to see if you have a variety of useful features when you are selecting a type of digital camera that you consider as being suitable.

The other features that makes buying a digital camera a marvelous idea is if you have access to a menu system that will help you navigate the many features of the camera. To have great pictures the metering, focusing and flash exposure systems will need to be seen to as well.

Your digital camera comparison will need to include the performance of the digital cameras that catch your eyes. In this category you should look at the noise level that can be heard from a digital camera. You will have to see if the different digital cameras have the capability of presenting you with clear and sharp pictures.

You will have to go through all of these aspects to find out if you are buying a worthwhile digital camera that you will use. From this digital camera comparison you will be able to know if you’re getting a good digital camera that’s worth the money that you are paying for it.



How to Compare Digital Camera Features

Friday, September 26th, 2008
digital cameras
Muna wa Wanjiru asked:


When we are ready to buy a digital camera we need to look at various facts. These facts will help us to compare digital camera features and eventually decide which digital camera we wish to buy. As there are many features that can be present in the various digital cameras you will need to isolate the main points and features of interest to you.

By narrowing this field of comparison we can look for only the items that will help us take great looking photographs. Among these items to be compared can be the amount of pixels that are offered in each type of digital camera.

To compare digital camera features like this you should have access to a buyer’s guide that will inform you about the amount of pixels that can be found in a digital camera. The amount of pixels will normally mean that your photograph quality will be very good.

You can also compare digital camera features to see if a digital camera is suited for the amateur photographer, semi-serious photographer, the serious amateur who is looking to better their photographic craft or even professional photographers.

The various information that you can find about digital cameras will let you see what different features are present in a certain digital camera. You will also see when you are looking to compare digital camera features of two or three digital cameras, if these digital cameras have the ability to turn your pictures into sepia, black and white, or soft focus pictures with the use of filters.

As you compare digital camera features it is necessary to see what types of shooting modes are present in the digital cameras that you want. There should be indications about the focusing and flash capabilities of different digital cameras like Canon, Nikon, Olympus, Minolta and even Pentac digital cameras.

These different types of information that you can find, will help you to compare digital camera features that are of a technical nature. There are other sources of information like photography magazines that will let you compare digital features that allow you to take photographs with special effects.

These effects can be how a zoom feature works to give you an unexpected shot from a totally new angle or the way that you can change the focus of a picture by cropping the surrounding areas of your subject.

To take great looking pictures it also helps to have a digital camera that provides you with many different helpful features. The many different sources that you can use like photography magazines, internet articles, and even digital camera buyer’s guides will allow you to compare digital camera features.

This way you can select the best type of digital camera that is suited for your needs. To compare digital camera features you need all of these different sources. This way you have a wide choice of digital cameras to look at.



Canon Digital Camera Prices Should not Scare you From Investing in One

Friday, September 12th, 2008
digital cameras
Muna wa Wanjiru asked:


As many of us are aware there are different types of cameras that you can buy. These cameras are equipped with certain features that make life comfortable for the camera enthusiast, and one of the best cameras to invest in is that of a Canon digital camera. Before you buy this camera you will need to find the various Canon digital camera prices.

These Canon digital camera prices will differ from camera model to camera model. In some cases you will find that the newer versions of your favorite camera are more expensive when compared with the earlier version. To keep up to date with the current Canon digital camera prices you should make enquires before you buy it.

One of the many Canon digital cameras that you can buy is that of the Canon Digital Rebel XT. The price for this digital camera at the time of released was about $900. You might still be able to find this camera retailing for that price at some camera stores but for the most part you should be able to purchase this camera for a lower price.

When this Canon digital camera was released the many features in the camera made it a success. These features are one of the main reasons why you can find these Canon digital camera prices at this amount. Another of the Canon digital cameras that you can buy is that of the Canon Digital SD500.

This interesting camera was released around about February 2005. At this point the Canon Digital SD500 was priced at about $650. On seeing this price, you might be led to believe that because the price of this Canon digital camera is lower than the canon Digital Rebel XT, that it is an inferior model. This simply is not the case.

This Canon digital camera is from another camera series and the features that are found with this type of Canon digital camera is the reason for the price. As you are looking at these and other Canon digital camera prices you will need to see what sort of features and capabilities these cameras are able to do.

The final Canon digital camera that we are going to look at is that of the Canon Digital PowerShot S2. This compact camera was sold at about $500 at the time of sale in 2005. The many people who buy this camera, like the great features which allows them to combine a digital camera with that of the movie making abilities of a camcorder.

The different Canon cameras that have just been listed are only a few of the model varieties that are available. You will need to see what the Canon digital camera prices are like for all of these when you are choosing the Canon digital camera that you want.