1.85:1 (37:20) and 2.39:1 (239:100) are the 2 most commonly used aspect ratios for movies. 1.85:1 is sometimes called widescreen and 2.39:1 is called anamorphic widescreen. These 2 ratios are wider than the 16:9 ratio, allowing videographers to capture a wider horizontal frame.

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The low power objective lens has more magnification power than the scanning objective lens, and it is one of the most helpful lenses when it comes to observing and analyzing glass slide samples. The total magnification of a low power objective lens combined with a 10x eyepiece lens is 100x magnification, giving you a closer view of the slide than a scanning objective lens without getting too close for general viewing purposes.

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A 1:1, or square aspect ratio indicates a width equal to height. Examples of square aspect ratios include 200 pixels x 200 pixels (200×200), 1m x 1m, and 50 widgets x 50 widgets.

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A 2:1 aspect ratio indicates 2 parts of width for every 1 part of height. Examples of 2:1 aspect ratios are 1,000 pixels x 500 pixels (1000×500), 600 ft. x 300 ft., and 20 led panels x 10 led panels (1:1 panels). 2:1 aspect ratios are classified as wide or landscape, since the width is greater than the height. Additional examples of landscape ratios would be 3:1, 16:9, and 4:3.

These ratios also tend to change. To stay up-to-date on the latest social media aspect ratios, check out these useful links from Sprout Social:

While an aspect ratio is not a fraction per se, calculating an aspect ratio as W:H uses the same math as simplifying a fraction.

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It is important to always use the correct immersion media (e.g. air, water, oil, etc.) that is specified by your objective lens.

If you have ever noticed black horizontal bars on the screen when watching a movie at home, that is because your TV is 16:9 and your film is a wider aspect ratio.

The high-powered objective lens (also called “high dry” lens) is ideal for observing fine details within a specimen sample. The total magnification of a high-power objective lens combined with a 10x eyepiece is equal to 400x magnification, giving you a very detailed picture of the specimen in your slide.

While video and image aspect ratios vary greatly across social media platforms, the 1:1 square aspect ratio is a very common one. It is also the most common ratio for icon and profile images.

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4:3, or 1.33:1 was the standard for video up until the late 90s/early 2000s before being replaced by 16:9. The most common 4:3 resolution on older TV’s was 640×480.

16:9 ratios (1.78:1) are the most commonly seen and used aspect ratio. They are today’s standard ratio for TV’s, monitors and portable devices. Most video is shot in a 16:9 resolution or close variation.

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The display of 4:3 footage onto a 16:9 display screen results in black vertical boxes on either side. This effect is also referred to as pillarboxing or reverse letterboxing.

Aspect ratios are most commonly used for digital images, videos, or display screens. The primary unit of measurement for aspect ratios is pixels, but they can be measured in other units such as feet, meters, LED panels, or square (1:1) widgets.

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Aspect ratios are the proportion of an object’s width to height, written as W:H or N:1. They are important to understand when properly sizing images, videos, and video walls. Use our handy calculator to calculate any aspect ratio with a breeze, or calculate them yourself with some simple math.

Similarly, if you have an LED video wall that is 550 pixels wide by 75 pixels high (550x75p), then its aspect ratio is 22:3.

A 1:2 aspect ratio indicates a height that is double the width. Examples of 1:2 ratios are 100 pixels x 200 pixels, 450 ft. x 900 ft. and 12 square tiles x 24 square tiles (i.e. LED panels). A 1:2 aspect ratio is considered a tall or portrait ratio. Any aspect ratio with a height greater than width is classified as such. Additional portrait ratios include 2:3, 9:16 and 1:5. Aspect ratios are independent of size, so a 3 ft. wide by 3 ft. tall box would have the same aspect ratio as a 1mm wide by 1mm high pixel (1:1, square).

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Many LED video walls are built into the common 16:9 aspect ratio. However, part of the allure of video walls is their ability to be built into custom aspect ratios.

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An aspect ratio written in the format W:H is a simplified set of numbers where W is the units of width and H is the units of height.

Nov 13, 2024 — This article discusses Optical coherence tomography or OCT of the retina, anterior segment, cornea, and optic nerve head.

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While the 4:3 aspect ratio has become virtually obsolete with video, it is still a common aspect ratio today for cameras and photography.

A scanning objective lens provides the lowest magnification power of all objective lenses. 4x is a common magnification for scanning objectives and, when combined with the magnification power of a 10x eyepiece lens, a 4x scanning objective lens gives a total magnification of 40x. The name “scanning” objective lens comes from the fact that they provide observers with about enough magnification for a good overview of the slide, essentially a “scan” of the slide. Some objectives with even lower power are discussed in Specialty Objectives below.

Odds are that most of your photos are in the 3:2 ratio. Popularized by 35mm film, it is the most common aspect ratio in photography today.

To calculate an aspect ratio as W:H, divide your width and your height by their greatest common factor (GCF), and write it as W:H, where W is units of width divided by the GCF and H is units of height divided by the GCF.

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Video walls that are wider than 16:9 may be referred to as panoramic or wide. Video walls with a height greater than their width are called portrait. Ultra-wide ratio video walls are often called ribbon boards, and ultra-tall ratio video walls are often called pillars.

If you are interested in buying various types of objective lenses for your microscope in the classroom, laboratory, research facility, or any other purpose, ACCU-SCOPE can provide the products you are looking for. Contact us today to learn more about our objective lenses and other microscope accessories.

The exact aspect ratio of these monitors actually tends to be 64:27 (2.37:1), but they are advertised as 21:9 (2.33:1), likely for consistency with the well-known 16:9 ratio.

Examples of units include pixels, feet, meters, and video wall panels. Any 2 dimensional units such as video wall panels must be square (1:1) for an accurate answer.

The oil immersion objective lens provides the most powerful magnification, with a whopping magnification total of 1000x when combined with a 10x eyepiece. But the refractive index of air and your glass slide are slightly different, so a special immersion oil must be used to help bridge the gap. Without adding a drop of immersion oil, the oil immersion objective lens will not function correctly, the specimen will appear blurry, and you will not achieve an ideal magnification or resolution. Oil immersion lenses are also available from some manufacturers in lower magnifications, and provide higher resolution than their "high dry" counterparts.

In this example, the highest number that will divide evenly by both 640 and 480 is 160. So both numbers are divided by this GCF and written as W:H.

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There are several other objective lens magnifications available with utility for particular applications. The 2x objective, widely used in pathology, has only ½ the magnification of a 4x scanning lens, thus providing a better overview of the sample on the slide. The 50x oil immersion objective, often used in place of the 40x objective, is used as a gold standard for observing blood smears. The 60x objective, often available in either dry or oil immersion, provides 50% greater magnification than a 40x lens. The 60x dry is sometimes chosen over a 100x oil immersion lens for higher magnification without the need to use immersion oil.  Finally the 100x dry objective doesn’t need immersion oil to deliver high magnification (still 1000x when combined with 10x eyepieces). However, the numerical aperture (an indication of resolving power of an objective) of a 100x dry objective is much lower than that of a 100x oil immersion objective and, as a result, the ability of the lens to resolve fine details in the specimen is much lower, too.

Most compound microscopes come with interchangeable lenses known as objective lenses. Objective lenses come in various magnification powers, with the most common being 4x, 10x, 40x, and 100x, also known as scanning, low power, high power, and (typically) oil immersion objectives, respectively. Let’s take a closer look at each of the different magnifications of objective lenses and when you would use them.

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An aspect ratio is the proportion of an object’s width to its height, most commonly written as W:H, with W representing simplified units of width and H represents simplified units of height. Aspect ratios may also be written as N:1, where N = W/H. For example, a 16:9 aspect ratio can also be written as 1.78:1 (16/9:1).

21:9 aspect ratios are the common ratio used for ultrawide or panoramic monitors, and it is very close in ratio to the anamorphic wide screen ratio (2.39:1) used in cinema.