![]() ![]() This comparison of changing aperture is from the article Remember the Background and Move Your Feet! While it is still possible to achieve some of the neat effects, blurry backgrounds, and fancy bokeh at these values with a kit lens, your ability to do so increases tremendously with an even wider aperture. The kit lens that came with my Canon T1i, a EF-S 18-55 mm f/3.5 – f/5.6, means that it has a maximum wide aperture of f/3.5 when taking a picture at 18 mm but that the maximum wide aperture at 55 mm is only f/5.6. For many zoom lenses, the widest aperture you can get varies depending on whether you are using the wider or narrower end of the zooming capabilities of the lens. If you have only a kit lens, then the widest aperture you have may be somewhere between f/3.5 and f/5.6. ![]() The widest aperture available on a given lens is often included in the name of the lens itself. ![]() Necklace Bokeh by Archaeofrog on Flickr, shot at f/1.8
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