10x25 vs 8x25 Swarovski CL Pocket Binoculars

This question is from a BBR reader looking to choose between the 8x and 10x versions of the Swarovski CL Pocket Binoculars::

Answer

Many thanks for the question. Which I will try to answer to the best of my knowledge:

In General
Firstly, because I have not tested the 10x25 version, I can’t comment on the actual view through this model specifically, but in general 8x and 10x versions of a binocular from the same series and brand tend to be quite similar, except for a few differences. Some of which can be important:

So, in general a higher magnification increases image detail, getting you closer to the target, but on the flip side…

• It leads to a narrower field of view
• Can in some conditions deliver an image that looks to be less bright, especially in low light – for the reasons behind this see my guide to the exit pupil.
• You also get an increase in Image Shake, however at 10x power this is for most users and uses is not a major issue
• Higher power models tend to be more expensive

You can read more about all these in my article on How different configurations affect binoculars

Real World Comparison
So let’s see if/how these general rules apply in this specific case and compare the main stats between the 8x & 10x Swarovski CL Pocket Binoculars.

In the table above, I have highlighted the differences and as you can see all of the points we discussed previously have played out in this case.

One point I did forget to add which is highlighted above was that higher powered models are often fractionally heavier as they need to use thicker lenses in order to magnify the image more. This fact also leads to another point:

Less light is able to pass through thicker glass and is another reason on top of having a smaller exit pupil why higher powered optics can be less bright than lower powered devices. Although the difference in this case between 8x and 10x on a binocular that uses the highest quality glass and coating is going to be extremely minimal.

In Summary

The Swarovski 8x25 CL Pocket

• Has a wider field of view making it easier to quickly lock onto your intended subject and then follow it (this can be important for uses like bird watching from closer distances), or if you need to scan wide open areas.
• The lower power will make it easier to keep the image still, which can be important if you have particularly shaky hands or view from a unsteady base (like a boat).
• May have a brighter image, which will be most noticeable in low light, which if you view wildlife, or birds at or before sunrise, after sunset or in dark forests/jungles is an important point to keep in mind.
• Is cheaper to buy
• Is fractionally more lightweight

The Swarovski 10x25 CL Pocket

• Gives you more image detail
• Delivers a higher resolution especially when viewing in dim light (see twilight factor).

More Alternatives & Further Reading:

I hope that at least some of these recommendations help, for some more advice, please refer to the links below:

• How Different Configurations Affect a Binocular
• Guides and Reviews to the Best Compact Binoculars
• Swarovski Binoculars