To use an 8/20 mm rangefinder: for an unobstructed view, stand behind the ball and align the “GREEN” line with the base of the flagstick. As for an obstructed view, do the same. Assuming the flagstick is striped, multiply the corresponding yardage to the number of visible stripes and then divide the result by eight. Choose the appropriate golf club according to the distance.

How to Use 8 by 20mm Golf Rangefinder
When using an 8 by 20mm golf rangefinder, you will have to deal with two types of views- obstructed and unobstructed. The instructions are different for either of these two views.
Unobstructed View
An unobstructed view describes the situation where there is nothing between the player and the target. The technique to go about this view is explained below.

Step 1: Locate the Flag Post Using the Green Line
To execute this first step, you have to stand behind the golf ball. Now, use your 8 by 20mm golf rangefinder to locate the flag post by using the “GREEN” line on the scope.
Step 2: Align the “GREEN” Line to the Base of the Flag Stick
Secondly, you have to tilt the golf rangefinder to align the “GREEN” line to the base of the flagstick. You must make sure that the “GREEN” line is perpendicular to the flagstick. This will require you extra effort and caution. However, this is the only surefire way to get precise results.
Step 3: Note Down the Distance
Once you are done aligning the “GREEN” line, use the scale on the screen to determine the number on your rangefinder corresponding to the top of the flag post. The corresponding yard grid indicates the current distance from the ball to the target. Finally, choose the appropriate golf club according to the distance.
Obstructed View
An obstructed view is when the view of the base of the flagstick is obstructed due to a hill or mound. This view poses some challenges for the player. Assuming you are playing on a course with a striped flagstick, then follow the steps explained below.

Step 1: Stand Behind the Golf Ball
The first step is naturally to stand behind the golf ball. Similar to the step explained in unobstructed view, use the golf scope to locate the flagstick on the green.
Step 2: Align the “GREEN” Line to the Lowest Visible Stripe
Secondly, you have to tilt your 8 by 20mm golf rangefinder and match the “GREEN” line to the lowest visible stripe of the flagstick. As explained before, the “GREEN” line should be perpendicular to the flagstick. Tilt the scope carefully to get the most accurate results.
Step 3: Note Down the Yardage
The next step for you is to note down the yardage corresponding to the top of the flagstick. The numbers will appear on the rangefinder’s scale.
Once you have identified the grid number, multiply it by the number of visible strips on the flagstick. Divide that result by eight if you are playing with an 8 feet striped flagstick. The final result will give you the yardage from the ball to the target.
Golf Monocular Rangefinder
Using a golf rangefinder monocular is not as easy as a binocular. According to Layman, a monocular is a binocular cut in half. The lens of a monocular has several marked lines that help determine the yardage. According to the distance, you can choose the appropriate golf club. It also helps you decrease the number of strokes from the tee to the flag.
A monocular rangefinder works in two different views as mentioned. They are obstructed view and unobstructed view. The obstructed view technique is used when there is an obstacle between you and the flagstick. You have to use a striped flagstick and do some specific calculations at the end to get accurate yardage in this case.
As for the unobstructed view, it is fairly easy. All you have to do is to align the “GREEN” line with the flagstick on the scope and get the yardage.

Frequently Asked Questions
Q: Where should I aim my golf rangefinder?
Ans: At first, it is better to aim the rangefinder at the ground. Press the button to start measuring distance. Once the rangefinder is ready and brings up the reticle on the screen, aim at the target and push the button.
Q: What can I do to keep my rangefinder steady?
Ans: You should adjust the magnification to aim properly. Also, you must work on your posture and grip. After pressing the button, learn to keep the rangefinder steady by not shaking the fingers. Lastly, practice until you get the hang of it.
Q: How does an optical golf rangefinder work?
Ans: An optical rangefinder utilizes two lenses, one that points straight ahead and another that points 90 degrees to the right. The rangefinder focuses the lenses together and forms a triangle. The triangle locks onto the flagstick and converts the height of the triangle to distance.
Conclusion
In golf, it is important to strategize better to gain the upper hand in rounds. With an 8 by 20mm golf rangefinder, you can easily save yourself from the tricky part of the golf course. Whatever the views may be, the steps are pretty simple and easy to execute. This article is here to make sure that you won’t have a hard time.
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