8×25 vs 10×25 Binoculars
When it comes to compact binoculars, the 8×25 and 10×25 models are two of the most popular options. But which one is better for your specific needs?
We’ll be comparing 8×25 and 10×25 binoculars based on various factors such as magnification, twilight factor, exit pupil, the field of view, eye relief, size and weight, and price.
We’ll also explore which binoculars are better suited for different uses, such as hunting, birdwatching, astronomy, nature watching, hiking, travel, concerts, theater, and sports events.
Additionally, we will compare some popular 8×25 and 10×25 binocular models available in the market
Quick Answer: While the 10×25 may offer better magnification, the 8×25 is still a great choice for those who prioritize a wider field of view and comfortable eye placement. Most people would likely prefer the 8×25 due to its bigger FOV and easier eye placement, even if it doesn’t offer the same level of magnification as the 10×25.
So whether you’re an outdoor enthusiast, a sports fan, or simply looking for a pair of binoculars to enhance your viewing pleasure, read on to discover the differences between 8×25 and 10×25 binoculars and find the perfect pair for your needs.
Magnification
Magnification is the ratio of the apparent size of an object as seen through a binocular to its actual size. It is one of the essential features of a binocular and determines how much closer the object will appear to the observer. The magnification of a binocular is represented by a number followed by an x, such as 8x or 10x, where the first number represents the magnification power.
When comparing 8×25 and 10×25 binoculars based on magnification, it’s essential to consider the trade-offs between a wider field of view and higher magnification.
The 8×25 binoculars provide a magnification power of 8x, which is suitable for general-purpose use such as hiking, travel, and sports events. They offer a wider field of view, making it easier to find and track moving objects. However, they may not provide enough detail for some specialized uses such as birdwatching or hunting.
The 10×25 binoculars, on the other hand, provide a higher magnification of 10x, making them suitable for specialized uses such as birdwatching and hunting. They provide more detail and a closer view of the object, but their field of view is narrower, making it more challenging to find and track moving objects.
We will see more about the field of view later in the article
Twilight Factor
The twilight factor is a calculation that determines the amount of light that reaches your eyes through the binoculars. It’s determined by taking the square root of the product of the objective lens diameter and the magnification. The higher the twilight factor, the clearer and more detailed the image(not necessary brightness) will appear in low-light conditions like dusk and dawn
The twilight factor is important because it helps determine the binoculars’ ability to produce a clear image in low-light conditions. It’s especially important for activities like astronomy, nature watching, and hunting, where the lighting conditions may be less than optimal.
When comparing the 8×25 and 10×25 binoculars based on their twilight factor, the 10×25 binoculars have a higher factor due to their higher magnification. For example, the Zeiss Terra Ed 8×25 has a twilight factor of 14.1, while the Zeiss Terra Ed 10×25 has a twilight factor of 15.8.
Exit Pupil and Image Brightness
The exit pupil is the diameter of the beam of light that exits the eyepiece of the binoculars. It’s calculated by dividing the diameter of the objective lens by the magnification.
The exit pupil of the 8×25 binoculars is 3.125mm (25mm objective lens divided by 8 magnification) and the exit pupil of the 10×25 binoculars is 2.5mm (25mm objective lens divided by 10 magnification).
When comparing the 8×25 and 10×25 binoculars, the 8×25 binoculars have a larger exit pupil due to their lower magnification. A larger exit pupil allows more light to reach your eyes, resulting in a crisper and brighter image.
Also, Typically, binoculars with higher magnification tend to be heavier than those with lower magnification. The reason for this is that higher-powered binoculars require thicker lenses to magnify the image more, which adds to the weight.
Therefore, When it comes to higher-powered optics, their thicker lenses allow less light to pass through.
As a result, in addition to having a smaller exit pupil, this factor also contributes to higher-powered optics appearing less bright compared to lower-powered optics.
However, the difference in brightness between the two may be negligible in case of very high quality binoculars.
| Model | FOV@ 1000yds | Size (cm) | Weight | Eye Relief | Exit Pupil |
|---|---|---|---|---|---|
| Swarovski CL Pocket 8×25 | 357ft | 10.9 x 9.9 x 4.6 | 12.2 oz | 17mm | 3.1mm |
| Swarovski CL Pocket 10×25 | 294ft | 11 x 6.3 x 4.6 cm | 12.3 oz | 17mm | 2.5mm |
| Zeiss Terra ED 8×25 | 357ft | 11.1 x 11.5 | 10.9 oz | 16mm | 3.1mm |
| Zeiss Terra ED 10×25 | 291ft | 11.4 x 11.2 cm | 10.9 oz | 16mm | 2.5mm |
| Nikon Travelite EX 8×25 | 293ft | 11.7 x 11.7 cm | 9.3 oz | 14mm | 3.1mm |
| Nikon Travelite EX 10×25 | 262ft | 11.7 x 10.9 cm | 9.5 oz | 11.1mm | 2.5mm |
| Olympus WP II 8×25 | 324ft | 10.7 x 10.4 | 10 oz | 15mm | 3.1mm |
| Olympus OP II 10×25 | 342ft | 10.7 x 10.4 | 10 oz | 12mm | 2.5mm |
Field of View
The field of view refers to the width of the observable image that can be seen through binoculars or other optical instruments.
A wider field of view is essential for various applications, including wildlife observation, birdwatching, and sports events, where the observer needs to track fast-moving objects.
A wider field of view enables the viewer to locate and observe subjects more easily and quickly, reducing eye fatigue and providing a more comfortable viewing experience.
The 8×25 binoculars usually have a higher field of view than the 10×25 binocular counterparts. In the below table, we see that except olympus all the other models confirm this.
This means that Usually, the 8×25 binoculars provide a wider view of the surroundings than the 10×25 binoculars.
Note: We have compared the popular Swarovski CL Pocket 8×25 vs Swarovski CL Pocket 10×25 in the below table and found 10×25 cl pocket has a lower field of view than the 8×25 cl pocket model.
| Model | FOV@ 1000yds |
|---|---|
| Swarovski CL Pocket 8×25 | 357ft |
| Swarovski CL Pocket 10×25 | 294ft |
| Zeiss Terra ED 8×25 | 357ft |
| Zeiss Terra ED 10×25 | 291ft |
| Nikon Travelite EX 8×25 | 293ft |
| Nikon Travelite EX 10×25 | 262ft |
| Olympus WP II 8×25 | 324ft |
| Olympus OP II 10×25 | 342ft |
Eye Relief
Eye relief refers to the distance between the eyepiece and the user’s eye that provides a full field of view. It is essential to ensure that the user’s eyes are in the proper position to see the entire field of view without vignetting or darkening at the edges of the image. In simple terms, eye relief is the maximum distance you can hold the binoculars from your eyes and still see the full field of view.
Eye relief is critical, especially for eyeglass wearers, as it ensures that they can see the entire field of view without taking their glasses off.
With insufficient eye relief, the eyepiece may be too close to the user’s eye, causing discomfort, eyestrain, and an incomplete field of view.
Eyeglass wearers require a minimum eye relief of at least 15mm, as they need enough distance to keep their glasses on while still seeing the whole image.
The 8×25 and 10×25 binoculars are relatively small and compact, designed for portability and ease of use.
However, they differ in their eye relief, which affects the viewing experience, especially for eyeglass wearers.
The 8×25 binoculars typically have an eye relief of 14-17mm, which is sufficient for most users, while the 10×25 binoculars usually have a slightly shorter eye relief of around 11-12mm in budget binoculars. In premium binoculars, we see the eye relief is the same in both 8×25 and 10×25 models.
| Model | Eye Relief |
|---|---|
| Swarovski CL Pocket 8×25 | 17mm |
| Swarovski CL Pocket 10×25 | 17mm |
| Zeiss Terra ED 8×25 | 16mm |
| Zeiss Terra ED 10×25 | 16mm |
| Nikon Travelite EX 8×25 | 14mm |
| Nikon Travelite EX 10×25 | 11.1mm |
| Olympus WP II 8×25 | 15mm |
| Olympus OP II 10×25 | 12mm |
Size and weight
When choosing binoculars, size and weight are important factors to consider, especially for those who plan to use them for outdoor activities such as hiking, camping, or traveling.
A compact and lightweight pair of binoculars can easily fit into a backpack or a small carrying case, making them convenient to bring along on any adventure.
Usually, higher-power binoculars weigh more than lower-powered binoculars. This is because higher-power binoculars have thicker lenses to magnify the image more.
For those who prioritize portability and want the lightest and most compact option, 8×25 binoculars are the way to go. They are easy to carry and won’t take up much space in a backpack or travel bag. They are great for hiking, camping, or other outdoor activities where weight and space are important considerations.
However, if a higher magnification is necessary, then 10×25 binoculars might be a better choice. While they are slightly heavier and bulkier than 8×25 binoculars, they are still relatively small and lightweight compared to other larger binoculars on the market.
| Model | Size (cm) | Weight (oz) |
|---|---|---|
| Swarovski CL Pocket 8×25 | 11 x 9.9 x 4.6 | 12.2 |
| Swarovski CL Pocket 10×25 | 11 x 9.9 x 4.6 | 12.3 |
| Zeiss Terra ED 8×25 | 11.1 x 11.5 | 10.9 |
| Zeiss Terra ED 10×25 | 11.4 x 11.5 | 10.9 |
| Nikon Travelite EX 8×25 | 11.7 x 11.7 | 9.3 |
| Nikon Travelite EX 10×25 | 11.7 x 10.9 | 9.5 |
| Olympus WP II 8×25 | 10.7 x 10.4 | 10 |
| Olympus WP II 10×25 | 10.7 x 10.4 | 10.2 |
Price
When purchasing binoculars, price is always an important factor to consider. It is important to note that the most expensive option does not always equate to the best quality. A buyer needs to consider the features they require and their budget.
When it comes to price, 10×25 binoculars are generally dearer than 8×25 binoculars. This is due to the higher magnification power and objective lens enhancement of 10×25 binoculars.
For example, the Swarovski cl 8×25 is cheaper by approx $50 than the Swarovski cl 10×25 binoculars.
Compare 8×25 vs 10×25 Based on Uses
When choosing between 8×25 and 10×25 binoculars, it’s important to consider the intended use. Here’s a comparison of these two types of binoculars for various activities:
Hunting:
For hunting, both 8×25 and 10×25 binoculars are suitable. However, the 10×25 binoculars can offer a better close-up view, which can be helpful when scouting prey. 10×25 also performs better and gives a clear and detailed image in lowlight due to a higher twilight factor.
8×25 binoculars typically have a larger exit pupil, making their images brighter.
Also, 8×25 binoculars are usually smaller and lighter, which can be more convenient for carrying around in the field.
Astronomy:
When it comes to stargazing, the 10×25 binoculars are generally the better choice.
They offer higher magnification making them ideal for observing celestial objects.
The 8×25 binoculars may be too small to provide a clear view of the night sky, especially for faint objects.
Birdwatching:
Both 8×25 and 10×25 binoculars are popular choices for birdwatching. The 8×25 binoculars can provide a wider field of view, which is helpful when tracking birds in flight or scanning a large area.
However, 10×25 binoculars can provide a closer and more detailed view of birds, making them a better choice for birdwatchers who want to observe details like feather patterns and markings.
Nature observation:
For nature observation, both 8×25 and 10×25 binoculars can work well, depending on the specific use case. 8×25 binoculars can provide a wider field of view, making them useful for observing landscapes, while 10×25 binoculars can offer a more detailed view of animals and plants.
However, it’s important to consider the weight and size of the binoculars for this activity, as it often involves carrying the binoculars for extended periods of time.
Concerts and theater:
For concerts and theater, 8×25 binoculars are usually the better choice due to their wider field of view. These binoculars can help viewers see the entire stage and performers at once.
However, if the intended use is to observe details like facial expressions or costume details, 10×25 binoculars may be a better choice.
Sporting events:
For sporting events, both 8×25 and 10×25 binoculars can be suitable, depending on the specific sport and viewing distance.
8×25 binoculars can provide a wider field of view, making them useful for observing the entire field or court.
However, 10×25 binoculars can provide a closer and more detailed view of players and the game, making them a better choice for fans who want to observe details like jersey numbers and facial expressions.
For Nature Watching:
Both 8×25 and 10×25 binoculars are suitable for nature watching, but it depends on the specific needs of the viewer.
The wider field of view of the 8×25 binoculars may be preferable for watching birds or animals in motion, while the 10×25 binoculars may offer better detail for stationary subjects.
The twilight factor is also an important consideration for nature watching, especially during dawn or dusk. In this case, the 10×25 binoculars may be a better choice as they allow more light to enter the eye and provide better image brightness.
For Hiking and Travel:
Both 8×25 and 10×25 binoculars are compact and lightweight, making them ideal for hiking and travel.
However, the 8×25 binoculars may be a better choice for longer hikes or travels due to their lighter weight and wider field of view, which can help with navigation and spotting wildlife in the distance.
The 10×25 binoculars are also a good choice, but their higher magnification may cause image shake or require a tripod, which may not be practical for hiking or travel.
Low Light & Bright Light Conditions
If you plan to use your binoculars in bright, sunny weather, the 10×25 model may be a better choice.
This is because the 10×25 binoculars will offer a larger magnification than the 8×25 model In bright conditions(You don’t need brighter 8×25 as conditions are already bright). And while hiking in the western parts like Arizona, the viewing distances can be quite long which makes 10×25 a suitable companion
On the other hand, if you plan to use your binoculars in low-light conditions such as the early morning or late afternoon, the 8×25 model may be a better choice due to the slightly crisper image influenced by the larger exit pupil.
Pros & Cons: 8×25 vs 10×25 binoculars
| Advantage/Disadvantage | 8×25 | 10×25 |
|---|---|---|
| Advantage | Wider field of view (FOV) for easier tracking of moving subjects | Greater magnification for closer views of distant subjects |
| Advantage | Smaller and lighter, making them more portable and easier to carry | Better Twilight Factor |
| Advantage | Slightly larger exit pupil for crisper image in low light conditions | |
| Advantage | Might provide Better Eye placement due to higher eye relief | |
| Disadvantage | Lower magnification may not be sufficient for certain types of observations, such as birdwatching or stargazing | Smaller FOV may make it harder to locate and track moving subjects |
| Disadvantage | Larger and heavier, making them less portable and harder to carry for extended periods of time | |
| Disadvantage | Can be Pricier than 8×25’s |
Conclusion
In conclusion, choosing between 8×25 and 10×25 binoculars depends on various factors, such as purpose of use and personal preference.
The 8×25 binoculars offer wider fields of view, brighter images, and better eye relief, making them suitable for activities like travel, and concerts.
On the other hand, the 10×25 binoculars offer higher magnification and better twilight factors, making them more suitable for activities like hunting, birdwatching, and long-distance viewing on safari.
Ultimately, the best binoculars for you are the ones that meet your specific needs and provide you with the most enjoyable viewing experience.
