PRESERVE IMAGE QUALITY - Maintain your lens's superior optics with this adapter, ensuring optimal image clarity and sharpness for professional-grade photography. ACHIEVE INFINITE FOCUS - Precisely engineered to allow infinity focus, expanding your creative possibilities in landscape and astrophotography with your Contax 645 lens. DURABLE BUILD QUALITY - Crafted from high-grade brass with stainless steel finishing, this adapter ensures a secure and stable connection, withstanding frequent use. AE PRIORITY SUPPORT - Enjoy automatic exposure priority, simplifying your shooting process while maintaining control over depth of field and creative effects effortlessly.