Gopro sideshot cam. How to get rid of fuzzy black edges?

[PigeonMan]

Ok so I have the gopro 7 black with eagle eye vision 12mm lens. Using sideshot mount. My recoding keep showing the black fuzzy edge. Which is so annoying. I tried everything to get rid of it but no success. I watch other ppls scope cam and it's so clear. Then why does mine keep showing the black fuzzy edges? Any advice to get rid of it? Here are so screenshot

 

[Joedirt199]

Have you tried adjusting the gopro further away from the eyepeice of the scope? It may be an eye relief issue much like getting your head in the right spot so the image is full and clear without scope shadow.

 

[PigeonMan]

Have you tried adjusting the gopro further away from the eyepeice of the scope? It may be an eye relief issue much like getting your head in the right spot so the image is full and clear without scope shadow.

Yeah I thought that was the case too. But if I adjust it further away it just zoom out and the black fuzzy edges will still be there.

 

[engfred]

You should measure the distance from the camera lens to the scope front and compare with what eye distance is for you scope.
Measure from the camera lens to the center of the side shot mirror / prism. and from the scope edge to the center of the camera lens axis.
Those two distances added up should be the same as the distance you have from your eyeball to your scope.
Also watch the image is not centered - so when your backing the camera out, the autofocus can go off focus.
It can be tricky until you have the right settings.
Also your 12 mm lens can be too far out. mine is almost at the bottom and then a little out

I would also say you are to close or to far away.