Vello LENS-2020 Lens Calibration Tool Test Camera's Auto Focus Accuracy, AF Fine Tune or AF Micro Adjustment, Fix Front- or Back-Focusing Issues, Includes a Gray Card for White Balancing, 1/4"-20 Tripod Attachment & Quick Setup, Two-Way Bubble...
Vello LENS-2020 Lens Calibration Tool Test Camera's Auto Focus Accuracy, AF Fine Tune or AF Micro Adjustment, Fix Front- or Back-Focusing Issues, Includes a Gray Card for White Balancing, 1/4"-20 Tripod Attachment & Quick Setup, Two-Way Bubble...