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Field Camera
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The word aperture means small hole or gap. In terms of photography the aperture is an adjustable opening used to control how much light gets in to the camera. Light enters the camera through the lens which uses a calibrated scale to determine the maximum and minimum aperture. This scale is written in f/numbers which are sometimes called stops. Sometimes beginners struggle to understand aperture fully. This is because a small aperture is denoted by a big number (such as f32) and a large aperture is denoted by a small number (such as f1.4).

Aperture is very important in macro photography as it is used to control the depth of field. The depth of field is the area in the picture that is in sharp focus. There is always going to be a small depth of field in macro photography due to the high magnification involved and the short working distance between the camera and the subject. Using a large aperture makes the depth of field smaller but will allow a faster shutter speed to be used. This reduces the chance of the picture being ruined by camera shake. Using a small aperture means using a slower shutter speed and increases the risk of camera shake. A sturdy tripod and a remote switch make it easier to get consistently sharp shots. Outdoor macro photography is even more of a challenge as you have the weather to contend with as well.

The main problem to overcome with macro photography is lighting. At high magnification and short working distance not much light is available. TTL flash is the only reasonable work-around. In-built camera flash is not very helpful in macro photography because it is set too far away from the subject. Special flash systems can be acquired which attach to the end of the camera lens. The most popular ones are called ring flash and usually contain one or two controllable fluorescent tubes. There are many other flash systems that you can use for macro photography. Twin flash is another popular system that contains two small flash units that attach to the camera lens. Some photographers attach a standard flash unit to an adjustable bracket or arm. This directs light directly above the subject. Flash allows the photographer to work with faster shutter speeds and smaller apertures and reduces the risks of camera shake. At high magnification the slightest movement of camera or subject will blur the image and ruin the shot. Flash photography can have its own problems, often making the images look unnatural. Sometimes too much light will reflect from the subject causing over exposure. To overcome this flash units have to be adjusted to provide the correct amount of light. This can be achieved by adding a special cover called a diffuser which lowers the power of the flash making it less harsh. There are several disadvantages of adding a flash unit. The added weight can make the camera more cumbersome and more difficult to hold. More time is required to set up the flash for each shot. If you are serious about macro photography a flash unit and a tripod are required to get consistently sharp images with good exposure. A remote switch is a small device that operates the camera from distance. Most macro photographers use a remote a switch to reduce camera shake. Remote switches are either remote controlled or have a short cable to the camera.

I hope this has been a useful introductory tutorial about the use of aperture in macro photography. Most of all put your camera into aperture priority mode and have some fun with macro. In aperture priority mode the camera will select the best shutter speed to match the aperture you have entered manually. This gives the photographer control over the depth of field and therefore control over the resulting image. Confident and credible images are the outcome of knowing how to adjust the aperture. Once established you will soon be taking great macro shots like a professional photographer. Good luck and happy shooting.

Marvin Africa is a Freelance Writer and Photographer. You can learn more about Aperture and Macro Photography on his website Macro Photography for Beginners

Canon Eos 5D Mark Ii And Nikon D3X Digital Camera Review

Copyright (c) 2009 Richard Walker

Canon has always been associated with some great futuristic technology in camera. In 2005 they had announced a new DSLR category when they had introduced their EOS 5 D model. This model was compact and had a full frame sensor. However, with the introduction of new cameras from Sony and Nikon, Canon has introduced an upgraded model namely the Canon EOS Mark II.

The Cannon EOS 5 D Mark II has scored an edge over its predecessors in resolution and many other features. This camera is way ahead of Nikon and Sony in terms of resolution and features. The Canon EOS 5 D Mark II has some great features like 21 mega-pixels, 1080p video, 3.0 VGA LCD, Live View, higher capacity battery and lots more.

The Cannon EOS 5 D Mark II Camera has anti dust features which means you don't have to worry about the dust clouding your lenses. It has a DIGIC 4 processor with 14-bit analogue to digital conversion capacity. The shooting rate has improved from 3 fps in its predecessors to an astonishing 3.9 fps.

We all know that Canon cameras give you great quality still pictures, but did you know that the Canon EOS 5 D Mark II is the first DSLR by Canon with high definition (HD) recording feature of 1920 X 1080 pixels (1080 p) at a speed of 30fps? This still camera boosts of the best quality video recording in full HD. The LCD screen has now increased to 3 inch and a resolution of 920 k dot/VGA. You can even connect your camera to HDTV with the HDMI port provided and a resolution of 1920 x 1080 pixels.

The viewfinder of Canon EOS 5 D Mark II boosts of a coverage of 98% and the shutter speed is 150k cycles and 6 AF assist points with 9-point AF system. The Canon EOS 5 D camera is one of the best cameras today for all the photographers whether amateur or professional.

Nikon 3 DX review

Nikon D3 X camera boosts of a high resolution and comes equipped with a full frame sensor. Nikon has been a revered name in photojournalism and sports photography and has now digressed to making high quality image field cameras. The Nikon D3X has a resolution to suit the requirements photographers in the world of art, advertising and fashion.

The Nikon D3X has a reduced burst speed of five frames per second than its predecessor which boasts of a speed of nine frames per second which is primarily due to the high resolution images and increased number of pixels.

The body of D3X is similar to its predecessor D3 and is made of magnesium and has weather proof controls which make the camera ideal for photojournalists and landscape photographers who need to brave the elements for their assignments.

Since this camera has been made primarily keeping landscape photographers in mind it has a great Live View and an auto focus system which can be adjusted and used while the camera is on the tripod stand. The Live View mode also has the virtual horizon display which prevents scary tilts.

A professional studio photographer will find this camera a great help since it can transfer large image files to the computer amidst photo shoots through wireless or cable links.

About the Author

I enjoy taking pictures of my grandchildren and being able to share them with family and friends. Having a good Digital Camera that takes superb pictures makes them so much enjoyable. In my search for a quality digital camera this is the one I found to be the best in its price range and camera reviews at http://www.camerareview-blog.com

Why does the batter seem larger than the pitcher from the center field camera?

When looking from the center field television camera position towards home plate, it would seem the pitcher would appear larger because he is between the center field camera and the batter, and thus closer to the camera...but it is the batter who appears larger.

Well, I've never noticed that! Strange because most pitchers are fairly tall, on average much taller than batters.

The only thing that I can think of is the focus: the batter is more in focus because it is where the camera is aiming (usually the catcher's glove). With the mound and the pitcher off to the side, maybe that make the pitcher smaller...

New Camera will Assist Fire Investigators
Article provided by the East Aurora Fire Department

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