# Quick Answer: What Do The Numbers Mean On Camera Lenses?

## What does F 1.8 mean on a lens?

F/1.8: A larger aperture value (larger fraction) = a wider opening = more light coming in = shallower depth of field (much less in focus) and a faster relative shutter speed..

## What does F 4 5.6 mean on a camera lens?

It means it’s a zoom lens that can open as wide as f/4 when zoomed out to the widest angle of view. … Remember that apertures are expressed as ratios or fractions, so f/4 means 1:4 (the aperture is 1/4 of the focal length) and f/5.6 means 1:5.6 (the aperture is 1/5.6 of the focal length).

## Is 1.4 or 1.8 lens better?

The 1.4 is quite a bit sharper than the 1.8 as well. If you shoot them side by side, you would easily be able to tell the difference in sharpness at the same aperture. It’s also nice that have that extra one stop of light. When you are shooting in low light situations, the bigger aperture helps.

## How do I choose the right aperture?

What about choosing the right aperture? Although the exact perfect aperture to use for a landscape is different in every scene, a good starting point is to set the aperture at f/11. If you need more depth of field, set it somewhere between f/11 and f/16.

## What does 70 300mm lens mean?

telephoto lensA 70 to 300mm lens a is a telephoto lens that has a zoom function. … Such a lens can be used for daylight telephoto subjects including wildlife, travel, candid and portrait shots due to its wide range of focal length. These lenses are also lightweight.

## What is the F on a camera?

In optics, the f-number of an optical system such as a camera lens is the ratio of the system’s focal length to the diameter of the entrance pupil (“clear aperture”). It is also known as the focal ratio, f-ratio, or f-stop, and is very important in photography.

## How far can you shoot with a 300mm lens?

For example, an APS type sensor at f/5.6 say at 300 mm with a focus distance set at 10 m will have a depth of field between approximately 9–11 m (so that is how far away you have to stand from the object).

## Is it better to have higher or lower aperture?

A higher aperture (e.g., f/16) means less light is entering the camera. … A lower aperture means more light is entering the camera, which is better for low-light scenarios. Plus, lower apertures create a nice depth of field, making the background blurry. You want to use a low aperture when you want a more dynamic shot.

## What is the difference between f4 and f2 8?

The further the reach of the lens, the better the bokeh tends to be. This helps in comparing these two lenses the f4 can reach much further than the f2. 8. … It may not reach as far but it still has a full stop more bokeh power.”

## How do you know what f stop to use?

If someone tells you to use a large aperture, they’re recommending an f-stop like f/1.4, f/2, or f/2.8. If someone tells you to use a small aperture, they’re recommending an f-stop like f/8, f/11, or f/16. As you can see, an f-stop like f/2.8 represents a much larger aperture opening than something like f/16.

## When would you use a 300mm lens?

If you really want to shoot like the pros, you’ll want a 300mm f/4, or 300mm f/2.8 or 400mm f/2.8. These lenses are great for getting you closer to the action, but you need to be sure your shutter speed is fast enough. Too slow a shutter speed will result in motion blur.

## How do you read camera lens specs?

The focal length range of a lens is expressed by a number, and that number tells you how much of the scene your camera will be able to capture. Smaller numbers have a wider angle of view and show more of the scene; larger numbers have a narrower angle of view and show less.

## What does f4 mean?

Rearranging gives aperture = f(focal length / F (the F ratio). So if you have a 50mm focal length and a 12mm aperture, F = 4, and aperture = f/4 (traditionally, a lot of rounding is allowed with lens specifications).

## What is a good aperture range?

An f/4.0 maximum aperture is generally good in medium lighting levels. An f/5.6 maximum aperture requires good lighting or image stabilization unless outdoors before sunset. If you are shooting landscapes from a tripod, you are likely happy with f/8.0 or f/11.0. That your lens opens wider may be of little importance.

## Is a 300mm lens good for wildlife?

Most photographers have zoom telephoto lenses in their kit bag, generally of the 70-300mm type or equivalent. These are a great starting point for shooting wildlife, but if you want to get serious about the subject, their relatively short reach can quickly become limiting.