Definition of Resolution: The minimum distance between two distinguishable object points is defined as the object-space resolution of a lens, denoted as Object Resolution, with the unit of μm. It should be noted that this is a pure intrinsic parameter of the lens itself, only reflecting the optical resolving power of the lens, and has nothing to do with the pixel count of the camera sensor. It directly indicates the size of the blurred spot formed when an ideal object point is imaged through the lens. Naturally, the smaller this value is, the better the performance.

Matching Between Lens Resolution and Camera Sensor Multiply the rated object-space resolution of the lens by the magnification to obtain the image-space resolution. Then compare the image-space resolution with twice the camera pixel size. If the two values are equivalent, the lens and the camera are well-matched. Whichever value is larger will become the bottleneck of the vision system. Formula: Object-space Resolution × Magnification ≈ Pixel Size × 2

Other expressions of resolution: For telecentric lenses, the magnification is fixed, so the object‑side resolution is usually marked directly. For FA lenses, the magnification changes continuously at different working distances; therefore, their image‑side resolution is generally specified instead, expressed in line pairs per millimeter (lp/mm). (For example, 230 lp/mm means there are 230 pairs of black-and-white lines within 1 millimeter, with each line width of approximately 2.2 μm, indicating compatibility with high-resolution cameras featuring 2.2 μm pixel size.) Sometimes an even more straightforward notation is used, directly stating that the lens supports 5-megapixel CMOS cameras. (Note: This means the lens is compatible with cameras of the corresponding pixel level; there is no such definition as “how many pixels a lens itself has”.)