In this tutorial, I’m going to explain what is an aperture and its relationship with depth of field. We’ll be working in the aperture priority mode and I’ll set you a task to help you learn how to control apertures and depth of field. Apertures in photography is an essential part of image taking. More importantly, it’s about learning the relationship between the aperture and depth of field.
Knowing this will help you create portraits with a blurry background, this is called a shallow depth of field, or it will help you create landscapes with everything sharp from the foreground to the background, this is called a long depth of field. This is a great aperture tutorial for beginners and I hope it’s explained simply so you can get out there and have a go yourselves!
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hello in this tutorial I'm going to explain to you what an aperture is and what it controls in photography and I'm going to give you a task so you can get practicing with it yourself hello I'm mark Newton from the school of photography and you can find us at the school of photography comm where we teach you the best in photography education now in this tutorial I'm going to explain what an aperture is what it does in photography and how you can control vision effects of an image using your aperture I'm also going to set you a task to do so that you can get practicing with it yourself as you know when you're looking at YouTube videos sometimes the information just goes in and straight out and it actually only sticks in when you start to do the task so I'm going to show you what tasks to do how to set your camera and how to practice with apertures so this is an aperture here it's basically a hole inside the lens that gets bigger and smaller – letting less or more light and it's very similar to the pupil in your eye when it's a bright day your pupil shuts up so that it lets in less light and when it's a dark day the pupil opens up to letting more light so an aperture works in a pretty similar way so an aperture on your camera is shown with the letter F in France via the F stands for focal length so when you see an F and a number that's the aperture and the aperture controls what's called depth of field in your in your photographs and depth of field is the distance around a focus point that is sharp now the wider the aperture that means the bigger the aperture the shallower the depth of field and that means that not much area around the focus point will be sharp and the smaller the aperture that's like a really small hole means that you're going to get a long depth of field which means a lot of distance around the focus point is sharp now like most things in photography everything's back to front so it confuses you even more and it's the same with an aperture so basically if you've got a low number it means it's a big aperture if you've got a high number like lift 22 that means it's a small aperture so everything's back to front in photography and I'm sure it's there just to confuse you but I'm going to give you a task now so that you can practice with them f-numbers and see the effect it has on depth of field okay like I said before it's always better to get hands-on and do stuff to remember it and that's what we're going to doing this task and that's also the way I teach my courses because I know that you retain the knowledge a lot better so if you want to learn about apertures do this task firstly put your camera onto a tripod and put it onto its two second timer or you can use a remote trigger and they'll keep it nice and still secondly put your camera to is a V setting or a setting depending on what camera brands you've got that stands for aperture priority setting then put your ISO onto 100 and then put your camera at a really tight angle next to a wall or a fence or something that's got a lot of distance in it and it works best if it's got a repeating pattern like a brick wall and have your focus point in the same place for each of these shots and then what we're going to do is take a picture going through the aperture stops or discourse called the aperture stops I'm going to go from f/4 5.6 811 16 22 and I'm going to show you how to do that right now okay I've got my focus point which is one line in between the two bricks here and I'm going to take a shot first of all at f4 f4 like that and it goes on a two second timer so it's going to be nice and still then I'm going to change my aperture and you do that on your cameras by twisting this dial on the top in your AV or a mode so I'm going to twist it to F 5.6 which is the next stop up take another picture then I'm going to twist it to f/8 and I'm going to twist it to f11 and to the next stop which is 16 and to the last one which is 20 so okay so this look at f/4 now what you can see is the distance that is sharp around the focus point is not very big that's a shallow depth-of-field now let's go to 5.6 and you can see that that depth of field the distance that is sharp is increasing and we go to f/8 and you can see it's increasing even more we go to f11 and it's conclusive more even in the foreground of the shot as well as the background of the shot keep your eye on that as well then we go to f-16 we're getting a much longer depth of field now and then to the last one which is f-22 and that's the one that's giving us the maximum depth of field so let's just put up the wide aperture f/4 next to the small aperture which is f-22 and this look at the difference there and you can see that the depth of field is massively different between the two so the aperture is a hole inside the lens that gets bigger and smaller that let's see more or less light but it also controls depth of field the distance around the focus point that is sharp so hopefully now you can go out and you can practice this and once you've practiced it with a wall or a fence or something like that then you can start practicing it with people and that's when you start to get really nice shots of portraits of the background nicely blurred out so if you want to know more about photography come over to the school of photography comm where we have a range of online courses for you to try and please support us here by liking the video sharing it with your friends and subscribing to the channel and don't forget to check out our wonderful learning community on social media where we have lots of people just like yourselves thanks for watching and remember learn more at the school of photography