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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/12/2008 at 17:54
Gio View Drop Down
Optics GrassHopper
Optics GrassHopper

Joined: March/14/2008
Status: Offline
Points: 6
Can someone explain the cause of this problem. With many scopes (more so with cheaper high magnification models) i see a black ring when I look through the scope and it takes alot of head movement to find a spot where I have a full sight picture. This ring floats around the perimiter of the viewing area until my head is in just the right position. What is this and how do i fix it. It really drives me crazy!!
Thank you in advance for your assistance,
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/13/2008 at 11:14
Mike McDonald View Drop Down
Optics Journeyman
Optics Journeyman

Joined: September/01/2004
Status: Offline
Points: 733
It's not a problem, jsut a normal optical condition with any scope.
Each optic has an established eye relief which may be a fixed distance, or a slight range of distance, as an example, 3.5 to 3.8 inches behind the ocular lens.
The "black ring" can actually be used as a tool to tell you when you are lined up behind the scope properly.  Any mis-alignment will cause a portion of the sight picture to have a black shadow along the outer portion of the ocular.  This mis-alignment will cause the bullet impact to shift toward that shaded area.  A scope too far forward will have that shaded area surrounding the complete picture, as you noted.
How do you combat this "problem"?
Set you rifle and optic to account fo the shooting position you use, adjusting the mounted scope for proer eye relief.  That way when you get on the rifle, the "black ring" will have magically disappeared.

Edited by Mike McDonald - April/13/2008 at 11:16
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/13/2008 at 11:35
Rancid Coolaid View Drop Down
Optics Jedi Master
Optics Jedi Master

Joined: January/19/2005
Location: United States
Status: Offline
Points: 7636
Buy this scope:

and, with any luck, you too will notice that the black ring is not present.  I was impressed with the clarity and color, but most impressed that the image extends to the far edges of the glass - making the tube seem to disappear.

Buy this scope and the problem is gone.  It ain't cheap, but if the problem drives you crazy, this is a way to solve the problem.
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