{"id":25932,"date":"2021-09-23T08:20:03","date_gmt":"2021-09-23T08:20:03","guid":{"rendered":"https:\/\/helpsfortech.com\/?p=25932"},"modified":"2021-09-24T15:48:30","modified_gmt":"2021-09-24T15:48:30","slug":"shutter-speed-or-exposure-time-in-photography","status":"publish","type":"post","link":"https:\/\/helpsfortech.com\/shutter-speed-or-exposure-time-in-photography\/","title":{"rendered":"Shutter speed (or exposure time) in photography"},"content":{"rendered":"
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Poorly controlled, shutter speed can\u00a0spoil your photos\u00a0or even frustrate you if you don’t understand it at all.\u00a0On the model of the article on the opening, let’s discover together the theory and the practice on this fundamental aspect of photography.\u00a0Follow the guide !<\/p>\n

Definition<\/h2>\n

The shutter speed is the\u00a0time during which the shutter opens\u00a0on release, that is to say the time during which your sensor is exposed to light.\u00a0If you prefer the window metaphor:\u00a0the time you open the window.<\/p>\n

On the device<\/h2>\n

This speed is expressed in seconds, and more commonly in\u00a0fractions of seconds: 1 \/ 125s, 1 \/ 3200s, etc … The higher the speed, the less time you open the window, the less light you let in.\u00a0Thus, you will let in more light at 1 \/ 125th of a second than at 1 \/ 3200th of a second, for example.<\/p>\n

Modern cameras generally allow you to use\u00a0very fast speeds\u00a0(1 \/ 4000th or 1 \/ 8000th of a second for example)<\/em>,\u00a0very slow speeds\u00a0(30 seconds or more, for taking\u00a0long exposures)<\/em>, and of course all more classic speeds between the two.<\/p>\n

How to adjust the shutter speed<\/h2>\n

Here, everything happens a bit like the opening.\u00a0(for details, see the article on\u00a0camera modes)<\/em><\/p>\n

In manual mode (M)<\/h3>\n

In manual mode, when\u00a0you turn the dial, you directly change the shutter speed<\/a>.\u00a0No, it’s not more complicated than that.\u00a0And yes,\u00a0that’s it.<\/p>\n

Be careful, on some devices, there are\u00a0two knobs: one will be used to change the aperture, the other the speed.\u00a0You just have to test to know which one does what.<\/p>\n

Again,\u00a0changing this speed affects the exposure\u00a0and you have to\u00a0compensate\u00a0with the aperture or ISO.\u00a0I therefore advise you not to use this mode until you have understood all the ins and outs of the exhibition, or at least the basics (that is to say after the article on ISO!: D)<\/p>\n

In shutter speed priority mode (Tv or S)<\/h3>\n

Once again, I’m going to repeat myself slightly: in this mode, your priority is to adjust the shutter speed (we’ll see in which cases just after).\u00a0You only set the speed, and the camera does the rest, that is, it takes care of the aperture and ISO (again if you left the\u00a0ISO auto\u00a0option).<\/p>\n

Motion blur<\/h2>\n

You have to remember that in the article on the aperture (decidedly), we saw the\u00a0background blur\u00a0(or \u201cbokeh<\/em><\/a>\u201d, for those who like the lingo).\u00a0This blurring is generally\u00a0intended\u00a0and can be simply controlled by\u00a0the aperture.<\/p>\n

There is also another type of blur:\u00a0camera shake, which is\u00a0due to the movements of the photographer.\u00a0This blurring is generally\u00a0undesirable, and you will try to avoid it.<\/p>\n

What influences this blur and why am I talking about it in this article about shutter speed?<\/h3>\n

In fact, the shutter speed strongly influences the presence or not of camera shake for several reasons:<\/p>\n