Lens Focus Calibration Chart With Bubble Level and 1/4-20 Tripod Mount

【Identify Focus Errors Before Shooting】: Check camera and lens accuracy to help detect front or back focus issues before portraits, product photography and close-up work. 【Support Consistent Autofocus Setup】: The alignment ruler and white balance card assist with fine-tuning interchangeable lenses for more consistent DSLR results in studio and field settings. 【Reduce Alignment Errors】: The built-in bubble level helps position the chart correctly on desks, tables and other flat surfaces during lens calibration. 【Stable Tripod Positioning】: The standard 1/4-20 mount allows secure attachment to a tripod, supporting repeatable camera and chart alignment during focus tests. 【Compact and Portable】: The lightweight calibration tool stores neatly in the supplied carrying case for photo sessions, routine lens checks and organised camera bag storage.