Reflective Lens Test Chart Kit, Micro Adjust Focus Board & 1/4"-20 Thread, Bubble Level, Alignment Ruler for Systems Calibration

Precision Focus Test: This professional calibration card kit evaluates the accuracy of the focus of cameras and lenses, allowing you to precisely adjust the autofocus system to get crisp, clear images. BUILT IN BUILT IN BUBBLE LEVEL - A built-in bubble level allows you to verify and maintain a perfectly horizontal position during testing, eliminating perspective errors for reliable calibration. 1/4"-20 UNIVERSAL CONNECTION: 1/4"-20 bottom threaded hole is compatible with standard tripod or camera mount, keeping the test board stable for hands-free video surveillance calibration. Alignment Ruler Included - A high contrast alignment ruler and standardized reflective patterns allow you to check lens resolution, focus accuracy and optical performance under different lighting conditions. Surveillance & Photography Use - Suitable for both surveillance calibration and professional photography, this versatile chart helps optimize your camera and lens for critical focusing tasks.