The sony 24mm f18 za carl zeiss sonnar t lens is a bright wide prime lens by carl zeiss suitable for portrait low light shooting landscapes and every day shooting designed with carl zeiss t coating on lens elements to reduce internal reflections and flare for high contrast images featuring a large maximum aperture of f18 and 7 blade circular aperture creates beautiful defocus effects the sony 24mm f18 za carl zeiss sonnar t lens offers a close focus distance of just 16mm for macro s