OPTIMIZED COMPATIBILITY - Designed specifically for the Blackmagic Design URSA Cine Camera, ensuring a seamless fit and reliable performance with your existing equipment. PRECISION ADJUSTMENTS - Includes nine shims for fine-tuning the lens mount, allowing for accurate back focus adjustments to maintain optimal image quality. ENHANCED IMAGE QUALITY - Achieve sharper images and eliminate focus issues by precisely calibrating your lens mount with the included shims for peak optical performance. DURABLE CONSTRUCTION - Crafted with high-quality materials, these shims provide long-lasting durability and reliable performance, even under demanding shooting conditions.