Joe,
Thankyou kindly for the post and I appologise for my impatience.
Now re the flash, fair point this could be a factor, but a couple of the photos I sent you were on land, with no flash, and when winding up ( or down, cannot remember now) the gamma the same circular pattern is evident. If the flash is at fault I doubt that I would get this artifact. Sorry, by the flash do you mean the stobe, or the inbuilt flash as I do get the same pink circle, on land, with the onborad flash.
Oh, BTW, Orb56, thanking you kindly for taking the time to test with your camera, I am much appreciated.
Where my concern lies if that in the colour information in the photo has this artifact, It is obviusly going to add or subtract from the actual picture image in this portion of the photo. In some instances, it has been hard not to ben over exposed, i.e. reflection of a silver fish etc, and what I am met with is this pink circle.
My old Samsung, RIP, was a simple point and shoot and it took fantstic photos, all without a strobe. On moving to a camera that was supposedly custom made for the purpose, the experience is not quite up to expectations. Over exposed or not, I feel I should not get this patteren.
Cheers