The Best D-SLR Cameras

The Best D-SLR Cameras

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Most consumer D-SLRs use image sensors that, while much larger than those found in point-and-shoot cameras, are somewhat smaller than a 35mm film frame. This can be a bit confusing when talking about a camera's field of view, as focal lengths for compacts are often expressed in terms of 35mm equivalency. The standard APS-C sensor features a "crop factor" of 1.5x. This means that the 18-55mm kit lens that is bundled with most D-SLRs with camera led lights such as Sony LED Video Light, Sony video light, Sony Camcorder Video Light, LED Video Light Camera Camcorder Lamp for Sony DSLR , LED Video Light Camera Camcorder Lamp for Canon Nikon Sony DSLR , Camcorder Video Light for SONY Panasonic Canon Video Camera DV , LED Video Light for Canon Nikon Sony, LED Video Light for Sony Camcorder, Video Camera Light For Sony, Sony Digital LED Video Camera Light, Video Camera Light For Sony Camera, Iphone 4s Accessories covers a 35mm field of view equivalent to 27-82.5mm. If you're upgrading from a point-and-shoot that has a 3x zoom lens that starts at about 28mm, the D-SLR kit lens will deliver approximately the same field of view.

There are many inherent advantages to a larger sensor. It allows you to better control the depth of field in images, making it possible to isolate your subject and create a blurred background. This blur is often referred to by the Japanese term bokeh. Much has been written about the quality of the bokeh created by different lenses, but the general rule of thumb is that the more light a lens can capture—measured numerically as its aperture, or f-number—the blurrier the background can be. A lens with a maximum aperture of f/1.4 lets in eight times as much light as one of f/4, and can create a shallower depth of field at an equivalent focal length and shooting distance.

Another reason to go for the big sensor is to minimize image noise. A 20-megapixel D-SLR has much larger pixels than a point-and-shoot of the same resolution. These larger pixels allow the sensor to be set at a higher sensitivity, measured numerically as ISO, without creating as much image noise. Another advantage to the larger surface area is that changes in color or brightness are more gradual than that of a point-and-shoot. This allows more natural-looking images with a greater sense of depth.

Some D-SLRs, like the Canon EOS 6D, feature sensors that are equal in size to 35mm film. These full-frame cameras are generally more expensive than their APS-C counterparts. If you see yourself moving up to a full-frame in the future, be careful in buying lenses. Some lenses are designed to be used with APS-C sensors. Canon refers to its APS-C lens line as EF-S, while lenses that cover full-frame are EF. Nikon takes a similar approach, calling APS-C lenses DX and full-frame lenses FX. Sony adds a DT designation to its APS-C-only lenses, and Pentax designates its APS-C lenses as DA.