What does target surface mean?

In the context of cameras and lenses, the target surface usually refers to the effective area of the photographic element (such as a CCD or CMOS) on a camera that is used to receive light and image the image, or more specifically, the portion of the camera's photographic element that is covered by the image projected by the lens. The size of the target surface directly affects the image quality of the camera and the range of applicability of the lens.

The association of the target surface in lenses and cameras

1、Match: There needs to be a good match between the lens target surface and the camera target surface. If the lens target surface is larger than the camera target surface, part of the light will not be received by the camera sensor, resulting in reduced imaging quality, dark corners and other issues. Conversely, if the camera target surface is larger than the lens target surface, part of the camera's sensor will not be fully utilized, will also affect the imaging effect.

2、Imaging quality: the size of the target surface directly affects the imaging resolution and detail performance. Generally speaking, the larger the target surface, the more light the camera can capture, the higher the imaging quality. Therefore, large target surface of the camera usually need to be used with the corresponding large target surface lens to give full play to its imaging advantages.

3、Lens design: As a special type of lens, the design of the zoom lens needs to take into account the factors of the target surface. In order to ensure that good imaging results can be obtained at different focal lengths, zoom lenses usually use complex optical design to optimize light transmission and imaging quality. At the same time, as technology advances and the market changes, modern zoom lenses have been able to support cameras with larger target surfaces. For example, POMEAS 4K HD zoom lenses are able to support cameras with a 1” target surface, which largely broadens the scope of zoom lenses and imaging capabilities.

4、Application Scenarios: Different application scenarios have different target surface requirements. For example, in the field of photojournalism, wildlife photography, sports photography, etc., the photographer may need to use a large target surface of the camera and the lens to capture long-distance, high-definition images. In some applications that do not require high image quality, cameras and lenses with small target surfaces can be selected to reduce cost and weight.

In order to ensure the quality of imaging and the applicability of the lens, users need to fully consider the size of the camera's target surface when choosing a zoom lens, and choose a lens that matches it.