The focusing distance of a macro USB camera module is usually between a few centimeters and tens of centimeters, with the specific range depending on the lens design and product specifications.
In macro mode, the minimum focusing distance of a regular USB camera module may be 2 a 20 centimeters, while some high-end products can shorten it to around 1 centimeter. This close-up shooting capability enables the camera to clearly capture minute objects. Per exemple, when shooting jewelry, insects or electronic components, it can present rich detailed features.
The focusing distance is directly related to the focal length of the lens. Short focal length lenses achieve a closer focusing distance by increasing the field of view, but they may be accompanied by edge distortion of the image. Long focal length lenses can reduce distortion, but a longer shooting distance needs to be maintained. Per exemple, a standard macro lens with a focal length of 50mm has a minimum focusing distance of approximately 20 centimeters, while a telephoto macro lens with a focal length of 200mm can achieve clear imaging at a greater distance.
The focusing distance parameters of different products may fluctuate due to design differences. Some professional-grade macro USB camera modules may optimize the optical structure to compress the minimum focusing distance to within 1 centimeter while maintaining consistent clarity at the center and edges of the image. Such products are usually equipped with aspheric lenses or floating lens group designs to correct aberration problems when shooting at close range.