Thanks Jeremy and stamper.
I think your observation is interesting about blown out areas in the sky. When I opened the file in ACR I was sure there were b-o-h. But the digital reading said no, that it was all below 250. And the foto does look like what I saw out there in the marsh. Is this a question of 'fixing' the image to make it look more acceptable- e.g. what we've come to expect in a good foto ? Oris this an instance of seeing something different, something in another way ?
Be interested to know your opinion.
And thanks again for your comments.
Richard