Digital Cameras

Digital cameras

Sales of digital cameras seem to be exploding. This is not surprising as the quality of images from digital cameras improves and they become more affordable. There are several things to consider when choosing a digital camera.

Types of Digital Camera.

There are basically three types of cameras whether you care shooting film or digital. Point and Shoot cameras, Prosumer cameras and professional quality cameras.

1. Point and Shoot cameras are fully automatic. The camera choosing the correct exposure and whether a flash is needed.
2. Prosumer Cameras. These cameras are a step up from point and shoot cameras and allow the user to either shoot in fully automatic mode or to have some control over the exposure by using specific exposure modes. For example, there might be a portrait mode, an action mode, and a close up mode.
3. Professional Cameras. These cameras allow the photographer to actually look through the lens.

Resolution

Regardless of what type of camera you decide to get you will also have to make the decision about the resolution of the camera. Although it is important there is much more to deciding on a digital camera than pixels. Pixels are tiny squares, and in new models other shapes, that make up the image. Obviously the more pixels the sharper the image, The more pixels there are the more detailed the image. Almost all of the digital cameras on the market today produce images with at least 4 million pixels. Since most people do not print images larger than this a camera with 4 million pixels or more should meet all of your needs.

Try Different Cameras Before you Buy

Different cameras can have very different image qualities even though they may have the same number of pixels. Digital cameras are constantly changing and being improved upon. Take the time to choose a good digital camera which makes quality photographs and enjoy the benefits of digital photography for years to come. Digital photography has created a new problem. People are not printing their photos anymore. Print those special photographs.

How To Choose a Compact Digital Camera

How to Choose

Compact digital cameras are such a craze today that almost every household has one. The popularity of digital cameras has in fact overshadowed to near extinction the use of cameras with films. Digital cameras may cost more than the ordinary camera but it is cost effective in the long term. Unlike ordinary cameras, digital cameras operate without expensive films. The mad rush for compact digital cameras has begun and even those who could not afford to buy one are saving for that precious digital camera. To make it a good investment, buyers of digital cameras should make sure they know what they are buying and that they are buying the digital camera that best fits their requirements.

Neophyte digital camera users believe that the higher the pixel of the camera, the better for them. The truth is, a digital camera's pixel is only as good as the user's requirements. It means choose a digital camera pixel depending on your needs and not just for the sake of buying a digital camera with high pixel.

Before considering the type of digital camera you need, it is practical to take note of your budget or allowance allotted for buying the camera. Choosing a digital camera brand really depends on the preference of the user. Prospective buyers of digital cameras should be patient in reading the guide or manual because unlike the ordinary camera, digital cameras, are a bit complicated to use the first time. When choosing which digital camera, take note of the optical zoom and not the digital zoom because the former does the real zooming. You also have to know that digital cameras come with software that will allow users to adjust the sizes of the photos. Whatever model of digital camera you choose, make sure it is appropriate for your requirements.

Battery Tips

Battery Tips

Are you always running out of battery power just before you take that perfect picture with your digital camera?

1) Turn off your digital camera when not in use.

2) Many digital cameras have a regular viewfinder and an LCD viewfinder. While the digital LCD viewfinder has its benefits, it can drain battery power.

3) Don't stop after taking every photo and look at the picture in your digital camera's playback mode.

Compact Flash Drive

Taking care of you new battery pack. Normally, a new battery pack comes in a very low charge condition and must be fully charged before use. Refer to the user manual of your portable electronic equipment for charging instructions. Your equipment may report a fully charge condition in as short as 10 to 15 minutes when the new battery pack is being charged for the first time. "Conditioning" (fully discharging and then fully charging) is necessary so as to maintain the optimum performance of a battery pack, and is recommended at least once a month particularly for Ni-Cd and Ni-MH batteries. Failure to do so could result in reduced charge capacity and can significantly shorten the battery packs useful life. Lithium Ion batteries do not require conditioning. It is normal for a battery pack to get warm when charging and during use.

Rechargeable batteries undergo self-discharging when left unused for long periods of time. For best results, always store a battery pack fully charged. The amount of runtime a battery pack produces depends on the power requirements of components in your electronic equipment. Don't let under-charged batteries keep you from taking great photos. If you infrequently use your digital camera, you may think that you after you use your digital camera, recharge your NiMH batteries, wait a few weeks or months, then use your digital camera again, that your batteries will be charged and you'll be ready to snap photos, right?

Battrey

Rechargeable batteries don't stay charged forever. If you charge your batteries and frequently use your digital camera, you will probably never notice this loss of power.

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Conversion of film cameras to digital

Digital camera

When digital cameras became common, a question many photographers asked was whether their film cameras could be converted to digital. For the most part a conversion to digital, to give enough space for the electronics and allow a liquid crystal display to preview, would require removing the back of the camera and replacing it with a custom built digital unit.

Many early professional SLR cameras, such as the NC2000 and the Kodak DCS series, were developed from 35 mm film cameras. The technology of the time, however, meant that rather than being a digital "back" the body was mounted on a large and blocky digital unit, often bigger than the camera portion itself. These were factory built cameras, however, not aftermarket conversions.

A notable exception was a device called the EFS-1, which was developed by Silicon Film from c. 1998–2001. It was intended to insert into a film camera in the place of film, giving the camera a 1.3 MP resolution and a capacity of 24 shots. A few 35 mm cameras have had digital backs made by their manufacturer, Leica being a notable example. Medium format and large format cameras (those using film stock greater than 35 mm), have a low unit production, and typical digital backs for them cost over $10,000. These cameras also tend to be highly modular, with handgrips, film backs, winders, and lenses available separately to fit various needs.

The very large sensor these backs use leads to enormous image sizes. Medium format digitals are geared more towards studio and portrait photography than their smaller DSLR counterparts, the ISO speed in particular tends to have a maximum of 400, versus 6400 for some DSLR cameras.

Line-scan camera systems

Scan camera

A line-scan camera is a camera device containing a line-scan image sensor chip, and a focusing mechanism. These cameras are almost solely used in industrial settings to capture an image of a constant stream of moving material. Unlike video cameras, line-scan cameras use a single array of pixel sensors, instead of a matrix of them. Data coming from the line-scan camera has a frequency, where the camera scans a line, waits, and repeats. The data coming from the line-scan camera is commonly processed by a computer, to collect the one-dimensional line data and to create a two-dimensional image. The collected two-dimensional image data is then processed by image-processing methods for industrial purposes.

Line-scan technology is capable of capturing data extremely fast, and at very high image resolutions. Line-scan-camera–based integrated systems, therefore are usually designed to streamline the camera's output in order to meet the system's objective, using computer technology which is also affordable.

Line-scan cameras intended for the parcel handling industry can integrate adaptive focusing mechanisms to scan six sides of any rectangular parcel in focus, regardless of angle, and size. The resulting 2-D captured images could contain, but are not limited to 1D and 2D barcodes, address information, and any pattern that can be processed via image processing methods. Advanced integrated systems include video coding and optical character recognition (OCR).

Professional modular digital camera systems

Modular digital

This category includes very high end professional equipment that can be assembled from modular components (winders, grips, lenses, etc.) to suit particular purposes. Common brands include Hasselblad and Mamiya. They were developed for medium or large format film sizes, as these captured greater detail and could be enlarged more than 35 mm.

Typically these cameras are used in studios for commercial production; being bulky and awkward to carry they are rarely used in action or nature photography. They can often be converted into either film or digital use by changing out the back part of the unit, hence the use of terms such as a "digital back" or "film back".

Digital rangefinders

rangefinders

A digital rangefinder is a user-operated optical mechanism to measure subject distance once widely used on film cameras. The term rangefinder alone is sometimes used to mean a rangefinder camera, that is, a film camera equipped with a rangefinder, as distinct from an SLR or a simple camera with no way to measure distance.

Digital Single Lens Reflex Cameras

DSLRs

Digital single-lens reflex cameras (DSLRs) are digital cameras based on film single-lens reflex cameras (SLRs), both types are characterized by the existence of a mirror and reflex system.

Bridge Cameras

Bridge cameras

Bridge cameras or SLR-like cameras are higher-end digital cameras that physically resemble DSLRs and share with them some advanced features, but share with compacts the framing of the photo using live preview and small sensor sizes.

Bridge cameras often have superzoom lenses which provide a very wide zoom range, typically between 10:1 and 18:1, which is attained at the cost of some distortions, including barrel and pincushion distortion, to a degree which varies with lens quality. These cameras are sometimes marketed as and confused with digital SLR cameras since the appearance is similar. Bridge cameras lack the mirror and reflex system of DSLRs, have so far been fitted with fixed (non-interchangeable) lenses (although in some cases accessory wide-angle or telephoto converters cannot be attached to the lens), can usually take movies with sound, and the scene is composed by viewing either the liquid crystal display or the electronic viewfinder (EVF). The high-end models of this type have comparable resolutions to low and mid-range DSLRs. Many of these cameras can store images in lossless RAW format as an option to lossy JPEG compression. The majority have a built-in flash, often a unit which flips up over the lens. The guide number tends to be between 11 and 15.

Compact Digital Cameras

Compact cameras

Compact cameras are designed to be small and portable; the smallest are described as subcompacts or "ultra-compacts". Compact cameras are usually designed to be easy to use, sacrificing advanced features and picture quality for compactness and simplicity; images can usually only be stored using Lossy compression (JPEG). Most have a built-in flash usually of low power, sufficient for nearby subjects. Live preview is almost always used to frame the photo. Compacts often have macro capability, but if they have zoom capability the range is usually less than for bridge and DSLR cameras. They have a greater depth of field, allowing objects within a large range of distances from the camera to be in sharp focus.

Video Cameras

Video cameras

Video cameras are classified as devices to record moving images.

Professional video cameras such as those used in television and movie production. These typically have multiple image sensors (one per color) to enhance resolution and color gamut. Professional video cameras usually do not have a built-in VCR or microphone.

Camcorders used by amateurs. They generally include a microphone to record sound, and feature a small liquid crystal display to watch the video during taping and playback.

Webcams are digital cameras attached to computers, used for video conferencing or other purposes. Webcams can capture full-motion video as well, and some models include microphones or zooms ability.

Digital Camera

Digital Camera

A digital camera is a camera that takes video or still photographs, or both, digitally by recording images on a light-sensitive sensor. In the Western market, digital cameras outsell their 35 mm film counterparts.^[1]

Digital cameras are incorporated into many devices ranging from PDAs and mobile phones (called camera phones) to vehicles. The Hubble Space Telescope and other astronomical devices are essentially specialised digital cameras.

Classification Digital Camera:

1. Video Cameras

2. Campact digital cameras

3. Bridge cameras

4. Digital single lens reflex cameras

5. Digital rangefinders

6. Profesional modular digital camera systems

7. Line-scan camera systems