What Is a Millimeter? Definition, Formula, Conversions, Examples

what does mm mean

In case you are wondering how to measure length in millimeters or how a length of a millimeter or 1 mm looks like, let’s check it out on a ruler. Many are marketed with language like “equivalent” or “35mm equivalent” along with what their field of view would match on a full-frame bookkeeping for startups camera to make choosing the right lens easier. Making wider angle lenses can be challenging and expensive if they have to cover a 36mm x 24mm imaging surface. If they’re designed to only work with a smaller imaging surface, they can be more economical and simpler to make.

For an example, take the Nikon NIKKOR Z 24mm f/1.8 S lens. On a full-frame camera like the Nikon Z5, it offers a very wide 84 degree angle of view. On a crop sensor camera like the Nikon Z50, which has a field of view 1.5 times narrower, the lens has an angle of view more similar to a 35mm lens on a full-frame camera. We have measures like meters and kilometers to express bigger distances, like the distance between two cities, the height of mountains, lengths of rivers, etc. However, the length of the wheat grain, the size of an ant, the thickness of a paper, etc., are some measures we find difficult to express in bigger units of measurement like meters.

Field of View Vs. Focal Length

If you’re going to travel but don’t have a lot of room, a single zoom lens that covers a wide range might be a good choice. Mm is an abbreviation that is a part of the metric system of https://marketresearchtelecast.com/financial-planning-for-startups-how-accounting-services-can-help-new-ventures/292538/ measurement. The metric system is used by almost every country in the world for weights and measurements. The U.S. is one of only a few countries that do not use the metric system.

You will most likely see it accompanying an image on a social site where people share memories. I’ve worked as a photojournalist and my work focuses on landscape, travel and reportage photography. I’ve won multiple awards for my photos, from sports action pictures to capturing breaking news.

What Does MM Mean on a Camera Lens? [The REAL Definition]

Now 10 million people use Remind101 when you add its teacher base to the students and parents they work with, spreading fastest in the southern United States, sending 65 million messages per month. Connect and share knowledge within a single location that is structured and easy to search. Unlock a special one-week offer to get access to this answer and millions more. We have to multiply the length by 10 every time we move from left to right. Also, for each time we move from left to right, we must divide the length by 10. The various definitions, examples, and related terms listed above have been written and compiled by the Slang.net team.

  • That’s because the field of view is narrower, making it appear cropped compared to the full frame field of view.
  • Some prime lenses are so thin that they’re referred to as pancake lenses, while some high-end, expensive zooms are nearly too heavy to handhold, requiring a monopod or tripod instead.
  • The U.S. uses the customary system for units of measurement.
  • A millimeter (abbreviated as mm and sometimes spelled as millimetre) is a small unit of displacement (length/distance) in the metric system.
  • As we can see in the chart, from mm to cm, only one jump to the left is required.

Here, millimeters help us accurately express their length. We can use the following conversion chart to convert millimeters into different metric units of length. Here’s a fun example to understand why small units are important. Gulliver, a sea captain and a surgeon, ends up on the island of Lilliput, where people are only about 6 inches in height. Everything in the town is so small, he has to document everything in smaller units like inches and millimeters (mm). Can you imagine measuring tiny things using units like yards or miles?

Prime Vs. Zoom

Focal length, and in the case of zoom lenses, focal length range, is part of what determines the size of a lens, but by no means all. Modern lenses are really good, even inexpensive zoom lenses. But if you want the very best bang for your buck, you might want to look at a prime lens.

what does mm mean

Usually, a zoom lens also has a marking showing its focal length near the front element. It’s usually formatted as two numbers separated by a hyphen, with the lower number coming first and showing the widest focal length and the higher number following it, showing the longest focal length. Telephoto lenses up to about 100mm are excellent for portrait lenses, while lenses 200mm and longer are good choices for sports and wildlife photography, because they allow you to capture images from a distance.