Thanks for the response everyone my Saturday has been quite stressful ever since I first noted this.
I hope it is dust and nothing else will try taking some dusting advice and see if it cleans this issue. (No pun intended)
Andrew: I'm considering joining ASNSW hopefully, we can catch up sometime in the future.
Matt: Thanks I'm might grab that dust puffer/blower from the camera shop. Will read the manual in the meantime.
