There's nothing very fancy with this setup. However, I took the unique step of using double-sided tape to affix a level to the bracket.
I use the knobs to adjust for elevation and cant. If the scope isn't level, I have trouble adjusting the scope or rangefinder in the vertical plane.
For example, if I want to get the rangefinder on a target that is further away from the previous one, I'm usually increasing the elevation on the tripod head.
If the apparatus isn't level, the center of the rangefinder tracks up to one side or other of the target. Then I have to adjust the knob to track horizontally till the target is centered in the rangefinder.
So I use the level on the bracket to set the cant to zero on everything. Then when I adjust the tripod head to move everything, the target will be very close to center. This requires little to no adjustment in the horizontal.
It's the best $4.00 that I have ever spent.
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