This can't be right

Acquired my long awaited Nikon D7100 DSLR yesterday. What disappointment! After testing over 100 shots with different lenses and settings this 'contamination' is ever present. was going to be a 'shoot in the lakes' day today but it's cancelled. I think it'll be a 'sit in the camera shop' day instead. Oh dear.

Anyone heard of this problem please?