bak4 vs bak7

Bak4 Vs Bak7 [Detailed Difference And Descripton]


Binoculars are a great middle age invention. Be it hiking, stargazing, or nature watching binoculars are the best portable system to do so. So, you are looking to buy a binocular and want to know the better option between BAK4 and BAK7. 

In this article, we have made a detailed description of the differences.

So, Bak4 vs Bak7 which is better?

There is a simple way to differentiate the two prisms. The Bak4 is a more clear and used for day and night time watching. While the Bak 7 is better for glare protection. Besides this, the two prisms have distinctive differences. 

Now we will look at the differences through which can decide the better of the two prisms.

Quick Difference

Despite the fact that the prisms are created in the same way, they serve two distinct markets. This section of the post will quickly go through the major distinctions between the two systems. The most significant differences are listed in the following table.

Features Bak 4 Bak 7
Prism Type Roof Prism Porro Prism
Speciality Daytime and Nighttime Daytime Glare protection
Price High Priced Low Priced

This concludes our discussion of the primary differences between Bak4 and Bak7 prism lenses for binoculars. Now, in the following section of the article, we’ll go over these significant distinctions in further detail.

Detailed Difference

As previously noted in the value section, the distinctions can be divided into four broad groups. These distinctions have an impact on the overall visual and optical capabilities of the various binoculars. 

Something to keep in mind is that the Bak4 and Bak7 are two separate types of the prism. And these two prisms are utilized in different types of binoculars. 

The binoculars may come in a number of shapes and sizes, the prism variety gives the same ocular service. So, now let us look at the detailed differences.

Prism Type

The prism is the reflecting panel that permits the images to be magnified. This is applied by the binoculars when they are used with them. Furthermore, the various prism types enable for a variety of picture distortion and magnification effects to be achieved. 

Prisms are often classified into two categories. The Roof prism and the Porro prism are the two types of prisms. The Bak4 is a form of prism known as a Roof prism. This is a more advanced sort of prism. 

Furthermore, it is more expensive because the reflective index required for this prism is obtained through more difficult processes. The roof prism enables the binoculars to be constructed in a more narrow manner. 

It also allows the binoculars to be waterproof. The waterproofing feature is an added bonus. Roof prism binoculars are completely waterproof. Aside from that, the roof prism binoculars provide a more precise vision over time.

This is due to the fact that they are more durable and solidly built than the Porro prism binoculars. Taking a look at the Bak7, we can see that they are made of Porro pattern.If you compare Qhy with Zwo then you must notice some similar differences.

Porro prisms are made up of two prisms that are adjacent to one another and are ideal for tiny binoculars. They produce a binocular that is broader but shorter in length. They could be made water resistant. However, the prism does not normally have this advantage in most cases. 

It’s something that will have to be included later on down the road. The Porro prism is also notorious for being less durable than other prisms and for becoming less precise over time. 

For this reason, low care may result in the prisms becoming kinked. When it comes to this, the Roof prism is advantageous.

And these were the prism differences.


The numerous varieties of binoculars are built in a distinct way. And these two have chosen to specialize in two distinct areas of binoculars. The Bak4 binocular is a more well-balanced and altogether more solid kit than the Bak7. 

It is suitable for usage both during the day and at night. This is due to the fact that the Bak4’s prisms enable for clearer lenses to be used in the system. 

This is more beneficial to the overall performance of the binoculars. The Bak4 is great for stargazing, be it looking at comets or staring at the different colors of polaris. Such as yellow Polaris.

The Bak7, on the other hand, is more effective in reducing glare exposure. This is designed specifically for daylight use. This is because the prisms have been calibrated to work with lenses. That have a fuzzy and shaded contour around the edges of their lenses. 

The glare shielding provided by this is excellent. As a result, this function is not configurable and the image quality is frequently quite fuzzy or blurred. And it’s even harder at night when you’re trying to look at something. 

During the night, the blurred effects of the lenses lead the already dark images to become even darker. This occurrence is due to the blurred effects of the lenses. It also results in a lower level of service from the Bak7.

In many cases, you might need to keep your lenses clean. This may help in clearing out any dirt or blurs. So we have included some great cleaning products for you. 

Product 1
Product 2

So, in this case, the Bak4 provides a more balanced service compared to the Bak7.


The Bak4 and Bak7 are prisms that can be used with a wide range of binoculars. As a result, they do not have a price that is readily available in the marketplace. 

However, the quality of the prisms determines the price of the binoculars created from them. This may vary depending on the model. The pricing of binoculars can vary significantly from model to model based on the features that each model offers.

However, the prisms have an impact on the entire category of models as well as their costs. The Bak4 is a higher-quality product. It is constructed from a more durable material. Furthermore, it is more expensive to manufacture. 

As a result, it is the more expensive of the two binoculars in comparison to the other. The Bak7, on the other hand, is a more affordable entry-level model. It’s less difficult for the maker. 

Furthermore, it has a flimsy construction. As a result, the Bak7-based binoculars are less expensive than their predecessors. When compared to the Bak4 binoculars, the Bak7 binoculars are less expensive.

Final Verdict

So, after looking at all of the differences and characteristics of the two prisms we can come to a decision. The Bak4 provides a better overall balanced service. While the Bak7 is specialized for glare protection. 

But this feature causes the Bak7 to underperform in many situations. So, the Bak4 is better in most sectors but is significantly more expensive. So, if we are looking for a better performance and do not care about the price, the Bak4 is the better choice. 

And according to my humble opinion, the Bak4 is the overall better choice between the two.


What is BAK4 glass, and how does it work?

‘Bak4’ refers to a type of optical glass produced by Schott AG. This is a well-established and reputable German maker of optical glass. BaK is an abbreviation for BaritleichKron, which is German for “Barium Crown.” Prisms in most high-end binoculars are made of this material.

What exactly is the BAK4 prism design?

In comparison to other materials, it has a high refractive index and a lower critical angle. This means it transmits light more efficiently and allows for less light loss owing to internal reflection. Such as that caused by internal bubbles trapped during the manufacturing process.

What is FMC coating and how does it work?

FMC is an abbreviation for fully multi-coated. The abbreviation FMC is commonly used to refer to the term completely multi-coated. It is possible to reduce reflection by coating the optical surface of a lens. With a specific layer, it is accomplished through the coating process.


So, now you hopefully know all there is to know about Bak4 vs Bak7. And now we think that you will be confident enough to decide for yourself while buying the binoculars. We hope you were satisfied with our information. 

And until the next time, we meet, farewell!

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