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Noted Toronto photographer Simon Bell answers your 3D photo questions! Got a question not answered here? Send Simon Bell your question today!

Simon Bell

Simon Bell's passion for photography began when he was given a "box-brownie" camera at six years of age. That early interest developed into career in photography, multimedia and 3D imagery that continues today.

He has traveled the world with his cameras and has produced many slide presentations and books, often in 3D. His 3D StereoJet images provided support for the Toronto Olympic bid in 2001.
His images of bugs, lizards, birds and wildcats were published in a series of 3D kids' books. His current book, due in September 2003, is about the classic American cars in Cuba.

To learn more about Simon's work and see some of his photographs, go to http://simonbellphotography.com



QUESTION: What is 3D photography?

3D photography, also called stereo photography, involves making two or more images which, when viewed in combination, gives the appearance of depth. We perceive depth naturally because our two eyes are set horizontally apart, giving us two distinct perspectives on the world before us. Our brains fuse these two distinct views into a single view with depth. The aim of 3D photography is to replicate this effect.



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QUESTION: What makes a good 3D photograph?

3D photography requires all the skills of normal photography plus some added attention to the third dimension. When taking a 3D picture, a good rule-of-thumb is to try to include something in the foreground, middle ground and background of your shot. For instance, If your subject is a person standing in front of a wall, try moving your subject so that they are standing between the wall and perhaps some flowers in the foreground. Or try changing your point of view so that the wall recedes into the distance. Receding lines can make a 3D picture more dynamic.

When we look into a 3D picture, we like to be able to see everything in focus. So it's important to try to maximize the depth of field in your picture. Using higher speed film, such as 400 ASA, will help to increase the depth of field. Also, avoid letting the closest part of your picture being closer than your camera can focus. Read your camera's manual to find your camera's focusing range and for optimum results, keep everything in your image within that range.

Here are some additional tips for good 3D results:

-Don't hold your multiple lens 3D camera in a vertical position. Depth in your image will only be apparent when the camera is held with the lenses on a horizontal plane.

-Hold your camera as steadily as possible. Use a tripod in low light conditions if your camera is capable of longer exposure times. An interesting exception to this rule is to move the camera purposefully. Try panning your camera with a moving subject to create a 3D motion blur effect!

-Use a flash for interior shots or to brighten a subject that is not well lit by natural light. Remember that the light from a flash falls off dramatically the farther it travels away from the camera. So keep your subject fairly close when using a flash, usually about 6 to 12 feet , depending on your aperture, film speed and flash power.

-Don't shoot a 3D picture of something faraway such as a mountain range or a skyline without positioning something or someone in the foreground, otherwise you will have a very flat photo. The sense of depth falls off dramatically the further your near point is from your camera.



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QUESTION: What is the advantage of more lenses on 3D cameras?

Our head only has two eyes, so why would a 3D camera have more than two lenses? The simple answer: to make a better lenticular 3D print. While only two images, a left perspective and a right perspective, are required to make a 3D print, additional perspectives gives a print a wider angle of view of the 3D effect.



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QUESTION: Can I take 3D pictures with my regular camera?

It is possible to make a 3D image with any single lens camera by simple shooting two sequential pictures of the same scene, with a horizontal displacement between them. However, problems arise if anything in the scene moves between shots, or if the horizontal shift of the camera has vertical misalignment.



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QUESTION: Where can I learn more about 3D stereo photography?

There are clubs of 3D enthusiasts all over the world. Some of the larger groups are:

The National Stereoscopic Association (NSA)
The International Stereoscopic Union
The Stereoscopic Society

A popular on-line 3D discussion group is called photo-3d. It can be found at yahoogroups.com.

A very thorough book on 3D imaging and presentation is The World of 3-D: A Practical Guide to Stereo Photography by Jac. G. Ferwerda. A brief overview of this book can be found here http://home.att.net/~drt-3d/catalog/books/Ferwarda.htm



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