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Velvet Digest

What's the difference between shutter speed and aperture?

Author

Christopher Snyder

Updated on June 20, 2026

Aperture vs. Shutter Speed. In photography, aperture (also called f-number) refers to the diameter of the aperture stop (the stop that determines the brightness in a photo at an image point). Shutter speed on the other hand, is the total amount of time the shutter of the camera is open.

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Just so, is shutter speed and aperture the same?

Shutter speed and aperture are not the same. In laymen's terms, your aperture is the size of the hole that lets light into your camera. And shutter speed indicates how long the camera opens its door to allow this light to reach your sensor. Let's explain it a bit further, starting with aperture.

Furthermore, how do you set aperture? Grab your camera and set your camera mode to “Aperture Priority“. Set your lens aperture on your camera to the lowest possible number the lens will allow, such as f/1.4 if you have a fast lens or f/3.5 on slower lenses. Set your ISO to 200 and make sure that “Auto ISO” is turned off.

Keeping this in view, what is the relation between aperture and shutter speed?

NOTE: There is a reciprocal relationship between shutter speed and aperture. You can get the same amount of light if you change the shutter speed and aperture settings at equivalent amounts. For example, 1/30 at F5. 6 is the same as 1/8 at F11.

What is F stop and ISO?

In photography, an 'f-stop' or 'f/stop'is a measurement of the exposure. Exposure is made from three settings, which make up the exposure triangle. These settings are the shutter speed, ISO and aperture settings. If you were to increase the exposure by one f-stop, you would be doubling the exposure.

Related Question Answers

How do you adjust shutter speed?

Manual Exposure Shooting
  1. Set the mode dial to (Manual Exposure Shooting).
  2. Press on the control button.
  3. Press / to select the desired shutter speed, and press / to select the aperture (F value). Select a shutter speed from 1/2000 seconds to 30 seconds.
  4. Press the shutter button to shoot the image.

What is F stop in photography?

(Focal-STOP) The f-stop is the "aperture" opening of a camera lens, which allows light to come in. It also determines how much is in focus in front of and behind the subject (see depth of field).

What shutter speed should I use?

The rule of thumb is that the shutter speed should be 1/[Focal Length]. So if you are shooting with a 500mm lens, you should set your shutter speed to 1/500 or higher.

How do you read shutter speed?

There should be a dial or arrows somewhere on your camera. Move the dial left or right/ arrows up or down depending on the shutter speeds you want. The shutter speed format is usually in 1/1000, 1/250, 1/30, 1/2, 1/4, etc. The higher the bottom number, the faster shutter speed is.

What affects shutter speed?

The faster the shutter speed, the shorter the time the image sensor is exposed to light; the slower the shutter speed, the longer the time the image sensor is exposed to light. If you are photographing a subject that is in motion, you will get different effects at different shutter speeds.

How is aperture measured?

The way aperture is measured is by f-stops, which is the ratio between the focal length of the lens and the actual diameter diaphragm opening. Lenses are rated by their maximum aperture or lens speed. Some lenses are very fast, which means that they can open up to f/1.4 or faster to let a lot more light in.

What ISO should I use?

As discussed above, you should always try to stick to the lowest ISO (base ISO) of your camera, which is typically ISO 100 or 200, whenever you can. If there is plenty of light, you are free to use a low ISO and minimize the appearance of noise as much as possible.

What are the shutter speed numbers?

Shutter speeds are expressed in seconds or fractions of a second. For example 2, 1, 1/2, 1/4, 1/8, 1/15, 1/30, 1/60, 1/125, 1/250, 1/500, 1/1000, 1/2000, 1/4000, 1/8000.

What is the best ISO setting for outdoors?

Here's a good stock setting for outdoor headshots: set Manual mode, Auto ISO with shutter speed at 1/250 sec and the aperture at its widest setting, such as f/4. With flash, use a similar setting but with ISO 100. Take test shots to work out the best pairing of aperture and flash power.