Nothing adverse. First, the image wasn't made in a H&A viewer. It's a magnified image taken in a diffused hemisphere. That is a semi-structured environment, but has fluid mechanics. The black areas are reflections of the dark camera lens above (the one that's taking the photo). If you shift that lens a micron the black areas shift. Move the lens closer and the black areas get wider. Back it off and they'll narrow.
I think this is an example of relative perfection vs absolute perfection. We are dissecting hugely magnified photos that reveal very small deviations in reflection patterns.
These are actual photos that will look a tiny bit different every time the diamond is re-positioned and re-imaged. Perfect orientation to the lens, at some level, is simply not attainable. As @John Pollard says a light performance photograph is a "semi-structured environment, with fluid mechanics".
It's a little like deciphering between two internally flawless diamonds. The designation is awarded if no inclusions are visible under 10x. At 15 or 20x an inclusion may become visible. Yet, the correct grade is still IF. At some level of magnification something WILL become visible in an IF clarity.
I think this is an example of relative perfection vs absolute perfection. We are dissecting hugely magnified photos that reveal very small deviations in reflection patterns.
These are actual photos that will look a tiny bit different every time the diamond is re-positioned and re-imaged. Perfect orientation to the lens, at some level, is simply not attainable. As @John Pollard says a light performance photograph is a "semi-structured environment, with fluid mechanics".
It's a little like deciphering between two internally flawless diamonds. The designation is awarded if no inclusions are visible under 10x. At 15 or 20x an inclusion may become visible. Yet, the correct grade is still IF. At some level of magnification something WILL become visible in an IF clarity.