"The LensAlign MkII Focus Calibration System uses the patent pending TPA Sighting System to perfectly align the lens on your camera for very accurate focusing. This MkII is the smaller and lighter version of the PRO model and easily disassembles for storage or transport. A standard 1/4-20 mount allows easy attachment to a tripod. Bring your lenses back to life. DSLR autofocus systems may not be as precise as you think. Manufacturing tolerances often result in subtle mismatches between camera bodies and lenses, resulting in poor autofocus performance. This can cause your images to be softer than they should be. Every maker of hi-end DSLRs acknowledges this by providing auto-focus adjustment capabilities right in their camera's menu systems. LensAlign MkII is the proven solution that offers accurate and repeatable calibration for each of your lenses. Photographers can use LensAlign to determine if the auto-focus system of their camera is working properly with each and every lens. In other words, using LensAlign, one can assess whether a specific camera body and lens combination is capable of attaining the maximum sharpness for that pairing. And if not, LensAlign is the premiere solution for determining the best setting in your camera's auto-focus adjustment menu."