Tuesday, 31 July 2012

[BuyCanonSLR.com] Discussing High Speed Digital Cameras

By Dan Feildman

In this hi-tech world of high-speed life everyone wants that their work be done fast and fine. With the help of digitalization, all consumer electronics are being developed to give you quick performance with optimum results. One such category is high speed digital cameras. These high speed digital cameras are specially designed for advanced professional and industrial usage. Let us try to understand the concept of high speed digital cameras in detail.

High speed digital cameras are basically designed to capture very fast images. They are prominently used in industrial and scientific applications where a process of their function is moving or changing rapidly. These high speed digital cameras have the ability to operate both in color and monochrome mode.

Monochrome photos are in either total black and white or a combination of both which will give you a grayscale photo. When taking color photos these cameras operate on the RGB method which generates a range of colors. RGB, or red, green, blue senses the red, green and blue components and then conjoins these components to form an extensive spectrum of colors.

A variety of unique features determine the performance of a high speed digital camera. These features are horizontal resolution, maximum frame rate and shutter speed. Horizontal resolution is the highest amount of individual photo elements which can be distinguished in one scanning line. This is an essential feature for characterizing correct horizontal video resolution for image aspect ratio. Horizontal resolution is also used to specify the resolution in the biggest circle which can fit in a rectangular image. For example, an 800x600 image would be specified as 600 horizontal lines.

Maximum frame rate refers to the maximum number of photos that can be taken in the specific time period. The time period is usually counted in seconds. Shutter speed refers to how much light will be let in during exposure. This can be set across a wide range, depending upon the subject and light conditions.

High speed digital cameras are available in two basic technologies. These are CCD and CMOS. CCD refers to charge coupled devices. The CCD is composed of a light sensitive silicon chip. As the light falls on the CCD, it starts converting light into electrons. A CCD carries these electrons across the chip where they are read at one corner of the array. Now with the help of an analog-to-digital converter, the amount of electrons at each photo site is measured and then they are converted into the binary form.

CMOS refers to the complimentary metal oxide semiconductor. CMOS technology is also used to convert light into electrons. A CMOS uses a variety of transistors in every pixel to move and amplify the charge using traditional wires. The signals of CMOS don't require conversion into digital form as they are already digital. The CMOS image sensors consume low power as they operate at lower voltages than the CCDs.

The most popular choices for digital output include Ethernet, RS232, DeviceNet, CANbus, USB, SCSI, modem and wireless. The usual choices for the number of megapixels can vary from 8 bits to 16 bits. Even the color output can vary from composite, RGB or S-Video.

Some of the prominent physical features for the high speed digital cameras include radiation hardened, underwater rated, outdoor rated, goose neck, board mount, pan or tilt and remote head.




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Wednesday, 25 July 2012

[BuyCanonSLR.com] How To Capture Perfect Wedding Moments

By Dan Feildman

A wedding is undoubtedly one of the most precious moments in a person's life. Capturing it on film to be stored forever is even more important. Today, brides and grooms have so any options to choose from when it comes to choosing the kind of photography that they want for the most important day of their lives.

If you are planning your wedding here are some tips to getting the wedding photos of your dreams.

1. Selecting the right photographer Before you can choose a wedding photographer the couple must first decide on the styles of photos they want.

Portrait photographers are perfectly capable to take both formal and casual pictures, but he will most likely concentrate on the formal ones.

Photojournalists typically focus mainly on candid shots, not posed.

You can also choose someone who is a hobbyist. These people may be a friend or relative who might offer their services for a pretty low price. Unfortunately with a hobbyist you won't know the quality of their work unless they have already taken wedding photos and have a portfolio to show you. In this instance you do run the risk of having your photos not turn out as well as what you would receive from a professional.

2. Getting the perfect camera Wedding photographers usually use two basic camera types: the 35mm and the medium format. The 35mm has the tendency to produce pictures that are a little grainy, but the only person who may notice the difference are the photographers themselves.

3. Color or black and white? Color is usually used in wedding photos, but those who want a more artistic feel may go for the black and white film. Black and white photos lasts longer than color ones, though color films capture the details of the event more appropriately. One option would be to take the pictures in color first, then have copies made in black and white.

4, Personality of the photographer You want to make sure that the photographer you choose is friendly and sociable and has a personality type that you can work with. You want to interview your candidates and talk candidly about what your needs are and what you will expect of them. You also want to ask for references and view his portfolio of work to make sure his standards meet yours.

Following these tips will help couples get the perfect photos to preserve the memories of their special day. Great photos can be showcased proudly and passed down to future generations to cherish.




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