This first one is a light flare from a camera that I am pivoting clockwise and counterclockwise. As you can see as the camera pivots counterclockwise, this flare artifact moves
significantly to the right in the frame, and to a
much lesser extent, to the left relative to the scene/floor.
View attachment 81796
There's a lot going on here. I won't talk in absolutes but here are my best
guesses. I welcome any corrections or additions.
This is a ghost image.
Two possibilities:
An internal lens reflection. Light has entered the objective - the front lens. It has reflected off the (rear)
inner surface of the objective and then reflected off the (front) inner surface of the same lens. Or, off of inner or outer surfaces of internal lens elements.
It then is reflected to the sensor. It is a defocused image because it has a longer light path. It's an actual image of the scene. Theoretically you could see the entire landscape/whatever, but the light source dominates because it's so bright. It's an inverted image.
Or... the first reflection is off the sensor and then - as I understand it - off the (rear) outer (but uncoated) surface of the rear lens element. Or off the (front) inner surface of the same lens element (?).
Or off surfaces of other lens elements? Does that happen? Don't know. And from what I've been able to see, I don't think anyone knows for sure.
I don't know which is more likely. The classic internal lens reflection that involves lens elements only, or the sensor reflection.
Favoring the sensor reflection:
-This is a mirrorless camera; mirrorless cameras tend to have reflective sensors
-This is a very bright ghost image; which would go along with a reflective sensor
But there are two more artifacts, which are reflections of the original ghost image.
What do I mean? Watch the video again. There are two more ghost images. A bigger one and a third one that's even bigger. Reflections of the original ghost image. They get bigger each time because the light path is longer each time.
Would that make the sensor reflection or the classic internal lens reflection the better possibility? I don't know.
But the secondary reflections in a classic internal lens reflection should move in the opposite direction that the ghost image moves. Here, it doesn't. it moves in the same direction.
There are color fringes. That could be caused by...
-chromatic aberration
-diffraction effects on the edge of a lens element, or edge of the thing that supports the lens element.
-Lens Coating Reflection
But diffraction effects typically produce weird shapes that change dramatically as the camera pans, and lens coating reflections produce just a few colors, not a spectrum.
This is the cruncher... The reds dominate on the left edge and the blues on the right edge here...
... and the opposite over here
The difference between these two frames is that the light rays are hitting the lens at different (oblique) angles.
This color fringe is most likely due to chromatic aberration. It's called lateral chromatic aberration - as opposed to longitudinal (axial) chromatic aberration.
In a refractor telescope, you might see axial chromatic aberration around a star in the center of the field. But you might see lateral chromatic aberration around a star on the edge of the field.
This may have some importance as to why the OP artifact looks like this.... with a bright edge...
Could this also be due to chromatic aberration? Don't know. I'm interested to get some informed opinion.
The shape of the ghost is also distorted due to the changing angle of incidence of the light rays. Could that have some bearing on the appearance of the OP artifact?