principles of data economy and purpose limitation. The principle of purpose limitation states that data shall be collected for specified, explicit and legitimate purposes and not further processed in a manner [...] datenschutz@eschenbach-optik.com. In the event of deletion of the data, participation in the prize draw shall be excluded. Detailed information can be found in the individual terms and conditions of participation [...] and contact data and product data are required. Should you supply these in our contact form, we shall store these data and use them for purposes of implementing the agreement or providing the service