High resolution and high quality diffraction data is most important for success of structure deterrnination by X-ray crystallography. A Wiessenberg camera for macromolecular crystallography (so-called Sakabe camera) combined with synchrotron radiation and imaging plates is powerful tool to collect good diffraction data from biological macromolecule crystals. Good diffraction data can be collected with this data collection system, however, it is not the perfect tool for data collection. It is very important to know the advantage and disadvantage of this system and optimize the parameters of data collection.