Although a number of elements affect overall DOF, selective focus increases as you get closer to your subject. Selective focus, the ability to isolate subjects from the background, is closely coupled to shallow depth of field. So those who shoot landscapes, interiors or other wide-angle subjects will find a full-frame dSLR offers a major advantage. Fast wide-angle primes are particularly hard to come by. They can be had, but they are rare and expensive. Of course the focal length magnification applies to all lenses, so it becomes difficult to find suitable wide-angle lenses for an APS sensor camera. They get a longer focal length without the need to invest in super-telephoto optics. A 200mm lens on an APS-C camera will capture an image roughly equal to a 300mm telephoto on a full-frame dSLR.Īt first this might seem to be a big advantage, and many wildlife and sports shooters choose crop cameras for this very reason. This magnifies the effective focal length of the lens. In other words, an APS size sensor crops the image that a full-frame camera would deliver. Availability of Wide Angle OpticsĬameras with an APS-C sensor are often referred to as “crop” cameras, because the smaller sensor captures a reduced portion of the image compared to a full frame sensor. When you compare sensors of the same pixel count, a full-frame sensor will generally control image noise better than its APS cousin. Amplification translates into heat, which increases image noise. Larger pixels collect more light, so there is less need to amplify the signal. For a sensor of any given pixel depth (megapixel rating) full-frame sensors will contain larger photo-sites (pixels). In reality, sensor dimensions determine the size of the individual pixels. Many photographers assume a manufacturer can cram any number of pixels into a sensor, so sensor-size is irrelevant to pixel count. This means prints from the full-frame dSLR have better tonal range. Overall, however, smaller sensors capture less dynamic range. Manufacturers use different methods of processing images inside the camera, so it is difficult to compare dynamic range between brands. Improved Dynamic Rangeĭynamic range refers to the ability of a camera to capture detail in both the shadows and the highlights. For small photos, the difference is marginal, but 8×10 and larger prints are noticeably superior from a full-frame camera. Since an APS image will require more enlargement than a full-frame image to obtain a specific size, prints from a full-frame image will almost always be superior. While the majority of dSLRs still use the APS size-sensor, full-frame cameras appeal to photographers for several reasons: Image quality APS size sensors were simpler to make and while smaller, offered sufficient quality for most users.īy the time digital technology evolved to where it became practical to build reasonably priced full-frame cameras, APS dSLRs had become the standard. Availability of larger sensors was limited, and the quality of some early 35mm size frame sensors was questionable.įor this reason, dSLR makers adopted a sensor the size of the APS-C film frame, which measures 15.7×23.6mm. It was difficult to build a sensor the size of a 35mm film frame. The first dSLRs created a dilemma for camera-makers.
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