The foldable eyecups of these binoculars make them suitable for most users, including eyeglass wearers and kids. Moreover, they are made of soft rubber, ensuring you a comfortable glassing experience for prolonged hours. You can easily adjust the eyecups according to your pupil distance, but for some users, these optics’ interpupillary distance (IPD) is not wide enough. The size of the exit pupil is the result of dividing the diameter of the field of view by the magnification. For instance, with the 12×25 binoculars, the size of the exit pupil is approximately 2mm. This is low compared to a pair of 8×42 binoculars whose exit pupil is 5.25mm. This number indicates the size of the shaft of light that gets to your eye. The exit pupil also determines the amount of light that gets through the optics. A higher number means brighter images, which is especially useful in low-light conditions. A higher number also means that the object will still be bright, even if your hand shakes. So for me as a non-wearer of glasses (only for reading) viewing with the Mksutary is problem-free and surprisingly comfortable. I’ll have to ask someone who wears glasses how he copes with it. Close Focus

In terms of quality and performance, these optics are quite average. They provide bright and clear images with minimal color distortions, especially when there is good lighting. Thanks to the easy-to-use and strategically placed focus wheel, obtaining a laser-sharp focus is also easy. The Occer 12×25 Compact Binoculars are lightweight, portable, and affordable. They have a BaK-4 Porro prism system and fully multi-coated lenses, delivering clear images with accurate color reproduction during the day. At dawn and dusk, they perform reasonably well considering their price. When you hold the binoculars in your hand for the first time, the thing is more compact than expected. Well, it’s 12×25. It’s very light, just under 10 ounces, and has grippy rubber armor on what appears to be a polycarbonate chassis. Mechanics

For a powerful pair of binoculars, these optics are surprisingly compact and lightweight. It is rare to encounter models that claim to have a 12x magnification and weigh less than 9 oz each. The problem with this combination is that it is challenging to stabilize the optics. Shaking will likely trouble you more often than you’d like.

While these optics work well enough during the day, they are not very useful as night-time optics (you’ll want to look into night vision goggles if you want something with built-in infrared illuminator). Nonetheless, color distortions are hardly noticeable during the daytime. BaK4 was specified in the Mksutary specs, but if you carry out the test just recommended, it seems more like BK7 prisms.Multiplication Table is an useful table to remember to help you learn multiplication by 25. You should also practice the examples given because the best way to learn is by doing, not memorizing. Online Practice Field of view refers to width at a distance. For example, if you are pointing the binoculars at something 1000 yards away, you can see an image through them that is 90 feet wide, but anything wider than that you wouldn’t be able to see. Higher magnification means a smaller field of view. At 12x magnification, the field of view narrows significantly, making it difficult to locate small and mobile objects when you are scanning from hundreds of kilometers. The eyepiece design plays a role in determining the field of view as well. The Diameter of the Field of Objective Lens These binoculars are equipped with a high-resolution BaK-4 Porro prism system and fully multi-coated lens coating. With these features, they deliver a crystal clear viewing experience almost instantaneously. The lenses produce natural colors with little-to-no color distortions. At the same time, they help prevent visual fatigue. The thing is amazingly robust and can be used on excursions, hikes, or in your free time. The model is small, very light, and extremely easy to stow away, so you can always have your binoculars with you. Summary