Is the prism system of the telescope better Paul or the ridge, and why?

1. Theoretically, each has its own strengths. None of them are exceptional.

If there really is only one that is clearly good, then the other has long been eliminated.

For example, the tightness, the ridge is easy to do, and the effect, Paul is easy to do. And so on and so forth.

2. In fact, there are many things that are not suitable for theoretical judgment, just like two students.

Many people, maybe from the configuration, look at the brains of the two of them, analyze which one is smart, which nose bridge is high, and which eye has a god.

But in fact, the most influential, fundamental, are some irrelevant and very ordinary, such as whether they are serious or not.

Telescopes are very similar to this, what really affects the performance is the gray area, and this kind of theoretical thing also has an impact, but it is very small compared to the former.

In fact, there are food safety problems everywhere in life, which is already hinting at this.

3. For those who are not familiar with the telescope, it is suggested that more attention should be paid to the whole, such as judging whether it is an irregular product from some clues on the surface, for example, from the common false propaganda, such as "infrared", "night vision", "cherry blossoms", "Russia", "military", "high times", etc., are common false statements. Meaning may not be very trustworthy. In these aspects, you can search for popular optics, and there are some systematic introductions in the knowledge introduction.

50 caliber and below, it must be a good roof, and now Paul's cost advantage is not big, and the ridge is not expensive.

Above 50, the roof size advantage is basically gone, such as 10x56 15x56, which is almost as big as Paul.

The bigger caliber is Paul's world.

Military telescopes do not use roof mirrors because of the high cost of roof mirrors, and all the ones I have seen are Paul mirrors, not only because they are simple and durable, but also because of the low cost of Paul telescopes, and the brightness and contrast can be achieved to a more satisfactory degree without too much cost.

The Porro and Roof telescopes are the two most commonly used telescope structures, with the difference being the prism structures used. The objective lens and eyepiece are not in a straight line, the middle prism part has a turn, it is a Paul mirror, the objective lens and the eyepiece are in a straight line, and the lens barrel is straight, which is a roof mirror (there is also a simple Galileo structure that is also straight).

The key to the roof mirror lies in the existence of the ridge surface, the so-called ridge surface is the reflection surface that will encounter a ridge-shaped reflection surface sandwiched by two reflective surfaces in the optical path, and the edges of the two surfaces are in the middle of the optical path, so some ridge prisms can see that there is a dividing line in the middle, in fact, it can also be understood as dividing the beam into two halves and then putting them together.

Advantages and disadvantages of Roof and Paul:

Advantages: The Porro Paul type will be brighter than the roof telescope of the same grade, and the contrast or imaging will be harder.

Disadvantages: Paul's telescopes will have poor realism, including the size and distance of the target is not as good as the roof type, and it is important to note that the sense of physical vision and operation is not good. And this is structurally determined, and cannot be changed through other adjustments.

As a result, most of the high-end telescopes in the name brand are ridge-type structures.

But the price you give belongs to low-end telescopes, which are basically produced domestically, and the optical performance is not much different. You can consider well-known domestic brands.

Mainly depending on what it is used for, the mirror of the ridge prism will be smaller in size than the mirror of the Paul prism, and it is more suitable for bird watching.

At the same price, the mirror of Paul's prism will be clearer.

The easiest way to distinguish between a roof telescope is to look at the shape, a ridge telescope is straight, and the objective lens and eyepiece are in a straight line, while the objective lens and eyepiece of a Paul telescope are not in a straight line.

If you buy a cheap telescope, the first choice is the Paul telescope, the telescope of this structure has a low cost and the optical effect is better than that of the same ** roof telescope.