I have just received a Schengen visa issued by Germany for a visit from 25-30 July 2013. The visa is for multiple entry. I am also visiting Belgium from 06-09 August but, although I requested the Schengen visa to be valid until 09 August, the German consulate in Cape Town issued the visa only for the dates I will be in Germany. Can I go to Belgium with this visa or must I apply to the Belgian authorities?