Macro Focusing

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Some telephotos and telephoto zooms available for the EOS 40D have particularly close focusing capabilities, making them macro lenses. Of course, the object is not necessarily to get close (get too close and you'll find it difficult to light your subject). What you're really looking for in a macro lens is to magnify the apparent size of the subject in the final image. Camera-to-subject distance is most important when you want to back up farther from your subject (say, to avoid spooking skittish insects or small animals). In that case, you'll want a macro lens with a longer focal length to allow that distance while retaining the desired magnification.

Canon makes 50mm, 60mm, 65mm, 100mm, and 180mm lenses with official macro designations. You'll also find macro lenses, macro zooms, and other close-focusing lenses available from Sigma, Tamron, and Tokina. If you want to focus closer with a macro lens, or any other lens, you can add an accessory called an extension tube, like the one shown in Figure 6.12. These add-ons move the lens farther from the focal plane, allowing it to focus more closely. Canon also sells add-on close-up lenses, which look like filters, and allow lenses to focus more closely.

Extension tubes enable any lens to focus more closely to the subject.

Extension tubes enable any lens to focus more closely to the subject.

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Digital Camera and Digital Photography

Digital Camera and Digital Photography

Compared to film cameras, digital cameras are easy to use, fun and extremely versatile. Every day there’s more features being designed. Whether you have the cheapest model or a high end model, digital cameras can do an endless number of things. Let’s look at how to get the most out of your digital camera.

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