Binoculars with a powerful magnification are in theory able to deliver greater image detail than those with lower powers. Or to put it another way, you are often able to see more at greater distances with more powerful binoculars.

It is for this reason that astronomy binoculars tend to have very large 50mm, 70mm or even 100mm diameter lenses.The first multiple they all share is 12, so this is the least common multiple. To complete an addition (or subtraction) problem, multiply the numerators and denominators of each fraction in the problem by whatever value will make the denominators 12, then add the numerators. EX: Thus even if we take the “largest compact” with 28mm lenses and combine it with a relatively low power, say 8x, you still only achieve an exit pupil of 3.5mm (28÷8). Whilst both the size and weight of most compacts is substantially less than your standard 8x42 or 10x42 binocular, in most cases the difference between a 21mm or 22mm binocular and a 26mm or 28mm one is not huge.

Converting from decimals to fractions is straightforward. It does, however, require the understanding that each decimal place to the right of the decimal point represents a power of 10; the first decimal place being 10 1, the second 10 2, the third 10 3, and so on. Simply determine what power of 10 the decimal extends to, use that power of 10 as the denominator, enter each number to the right of the decimal point as the numerator, and simplify. For example, looking at the number 0.1234, the number 4 is in the fourth decimal place, which constitutes 10 4, or 10,000. This would make the fraction 1234Their size obviously plays a large part in determining the overall dimensions of the instrument and larger lenses generally weigh and cost more to make. However their size also has a big effect on the image quality, brightness and low light performance of the device. Image Quality & Brightness This is very important to be aware of because your eyes require enough light for you to be able to perceive a bright, high-quality image.