Adjustment ring on old 2x9x38mm Bushnell Custom-M

[wreckhog]

On the eyepiece between my eye and the 3x9 ring is another lock ring. I can screw the eyepiece in and out, then lock it in position with the ring. What am I adjusting when I do this? Is this just to take the scope apart?

[Graybeard]

That's the ocular focus. It is intended to adjust it you your specific eye's requirements basically same as adjusting your binocular. You only need to do it once unless your eyes change.

Look at a clear blue sky or light colored wall. Turn it until the cross hair isclear and crisply focused. Don't continue to stare into the scope as you adjust. Make the adjustment then look as you don't want your eye to do the adjustment for you. Once the cross hair is as clearly focused as you can get it lock er down and leave it alone from then on.

[wreckhog]

Thanks, that makes a lot of sense.