At DSC our charts are engineered with one purpose in mind, to give you better, more precise images. Usage wear, exposure to sunlight / radiation and fading of the inks can cause charts to shift away from their calibrated values over time. Because of this, we recommend anyone using a precision test pattern have it replaced by the recommended update date to ensure accurate results. You wouldn't use a cheap or damaged lens on your new camera, why use a inaccurate test pattern? The EcoAlign program ensures your charts are replaced annually at a fraction of the cost to you. Subscribe to EcoAlign and discover why its become the top choice of engineers who are serious about image quality.