Equipped with an aplanatic reticle system, the thread counter meets the highest optical standards. The silicate glass lenses used here are not only scratch-resistant but also excel with a high depth of field and an extremely high-contrast image. The mount is impact-resistant and low-reflection. The housing is made of matte chrome-plated brass. A scale is integrated into the thread counter (scale length 10 mm, graduation 0.1 mm). - Foldable - Aplanatic precision optics - Robust housing made of chrome-plated brass