First of all, the basic principles of these two things are the same, they are both magnified by the optical system, and both belong to the telescope series.
If you want to look at the scene through the optical sight, you have to leave your eyes a few centimeters to see clearly, unlike a telescope, you can use your eyes directly on it. This is because the optical sight is designed with a super long exit pupil. When in use, the eyes can leave a certain safe distance. If the eyes are used close up like a telescope, in actual combat, the recoil of the sniper rifle will hit the eyes.
This is an eyepiece from a scope. It can be seen that, in order to obtain the above-mentioned "super long exit pupil" optical design, the field lens of the riflescope has a concave surface compared to the eyepiece of a common telescope.
Let's look at the other side. In Figure b below, we aim an 8x telescope and a rifle scope at 8x at the same target scene (grid with scales), the left It is the effect of the telescope, and the right is the effect of the scope. You will find that the field of view of the scope is smaller than that of the telescope.
In fact, the telescope also has this thing: ), the location is probably inside the circle marked in the picture above. However, when the telescope leaves the factory, this part has been adjusted by the instrument, and then the outside is covered.
Then why does this part of the scope stay outside?
First of all, why do telescopes have this kind of adjustment mechanism? Not all telescopes have this kind of mechanism. Generally, only binoculars have it. Simply put, it is to make the two barrels of the telescope aim at the same direction. In other words, when one lens barrel of the telescope is aimed at a target, its other lens barrel is also facing the target. This is the principle of optical sights and sniper rifles.
The process of installing the scope will inevitably bring errors, so the real use of the scope is not like in the movie. When it is time to use it, install the scope and aim directly. After actually installing it, you need to test fire first. According to the results of the test, adjust the two knobs on the scope to correct the error between the scope and the impact point little by little.
Contact Person: Miss. Allie Nie