The Imagemaster PRO ST is a test device for zoom lenses in smartphones. The imaging quality is measured using a narrow field of view (FOV) with high measuring point density (up to 99 measuring points). Using single telescope measurement technology, precise measurement of even small fields of view (FOV) can be realized. The Imagemaster PRO ST requires fewer hardware components while allowing easy setup and adjustment. As a result, a series product has been developed that allows smartphone and lens manufacturers to change products quickly and easily. An inspection system for high-volume production with a measurement time of 1.8 seconds per test specimen.