Instructions for setting up the Leica GEOVID HD-B 42 rangefinder
Dear teammates! I decided to share my experience of using the Lake rangefinder.
The latest models measure not only the range, but also such important shooting indicators as: the angle of the target location, temperature and pressure. Several types of ballistic curves are stored in the device's memory, which can be used for tuning. These ballistic curves do not take into account the characteristics of your personal ammunition, which makes the calculation very approximate
But the manufacturer of the device has provided for the possibility of calculating ballistics for your personal ammunition. The set of binoculars includes a mini SD memory card, which is inserted into the socket located in the battery compartment. The card is inserted with the contact plates to the outside of the device. You should write a personal program on it before inserting the card. You should go to the website www.leica-camera.com select the section "Sports optics" and in it the subsection Leica ballistics program (direct link to the program HERE). There you get the opportunity to choose-using standard data on the ammunition catalog or to fill in the presented table taking into account your own data on ammunition: speed, bal. coefficient and weight of the bullet. In the lower part of the table, it is possible to enter data on the excess of the optical line above the barrel, as well as the height above sea level used for calculating the shooting distance to "zero" and the temperature. This data can be useful in order to compare calculations using the Leica program and the Arrow Pro program. I made these comparative calculations to make sure that the data obtained using both programs is correct and monotonous.
After you have filled in all the data available in the table, you can move on. The program gives you the calculation of the ballistic curve with the construction of the bullet trajectory, where at various ranges are indicated: speed, drop, and residual energy. You can make comparisons of this data with other ballistic programs. I personally became convinced of the almost complete identity of the work of both programs. On the right side of the table, there are various icons. You should select the GEOVID icon with the drawn binoculars and insert the mini SD card into the computer, save the program data by clicking the above icon. If everything is done correctly, then you will be able to record data on the ballistics of your personal cartridge on a flash drive. If you use several carbines and different types of ammunition, then you need to write each of them to a separate flash drive, since the device program allows you to read only one position recorded on the SD card.
After saving the data on the flash drive, you insert it into the socket located in the battery compartment, with a contact group to the outside of the device. It is necessary to make settings in the rangefinder itself. You enter the device menu by pressing and holding the right button,. First, the section where you choose the European or American measurement system (meters or yards), then by pressing the right button you get to the ball.curves subsection, where you select the Card position, then again by pressing the right button you get to the section for selecting the range of shooting weapons to zero (100, 200,300). You should specify the data identical to what you specified in the Leica ballistic table, and then through the right button you will get to the section where the data on the cost of a click on your sight is selected. In my case, all the sights give 1 cm per 1 click, which in the binoculars corresponds to the subsection "10", i.e. 10 mm. When everything is set correctly, you get the following: when measuring the distance to the target, the device will show not only the distance, but also after it will show the number of clicks that you need to make in the sight to produce an accurate shot. The device will take into account all the important data contained in it: range, angle of the target location, pressure and temperature, as well as personal data of your ammunition and optics. In practice, I have seen for myself that this possibility significantly reduces the speed of making a decision on the correct and accurate shot. I recommend everyone to use this function, and not just limit themselves to measuring the range. Good luck to everyone in the mountains!
