Focus Calibration Chart with Bubble Level and 1/4-20 Tripod Mount for Digital SLR Lenses

Focus Accuracy Check: Assess the focus of your camera and lens before shooting, identifying any problems with front or rear focus in portraits, product images and close-ups. Auto Focus Aid - Accurately adjust interchangeable lenses using the alignment ruler and white balance card to achieve more stable results with your DSLRs, whether in the studio or outdoors. BUILT-IN BUILT IN BUBBLE LEVEL - Keeps the level aligned during focus tests, minimizing setting errors when testing lens accuracy on flat surfaces such as desks or tables. 1/4-20 Tripod Mount: Attach the calibration table to a tripod for stable positioning, simplifying repeated lens testing by constant alignment between camera and table. PORTABLE CASE: Carry and store the lightweight focus tool in its case, convenient for photo sessions, lens controls and keeping your camera bag tidy.