Can be used on 70-200 for approx 100-300 range as well as 200-600 & 100-400 lenses. The Sony SEL14TC 1.4x Teleconverter is designed specifically for E-Mount lenses, allowing photographers to achieve a 1.4x magnification factor without sacrificing image quality. This teleconverter, made by Sony, is compatible with select E-Mount lenses and is ideal for capturing distant subjects with precision and clarity. With this accessory, photographers can explore the world of telephoto photography and create stunning compositions with their Sony cameras.