Sphere of confusion – What´s the difference?

Our D8 goniometer is designed for the highest accuracy and precision, superb alignment, and long-term reliability. Our goniometer has the smallest error in intersection of the instrument axes, provides the best sphere of confusion, and is unsurpassed by any other goniometer. Even the tiniest microcrystal stays reliably centered during the entire data acquisition, guaranteeing the best possible structure.

A large sphere of confusion is a serious problem for large crystals because the scattering volume significantly fluctuates. Tiny crystals may even move out of the beam completely. The smaller the beam, the more pronounced this problem becomes. This inhibits proper scaling and absorption correction, and results in systematically poor structures.