DSLR Camera Aperture Explained [Exposure Triangle]

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DSLR Camera Aperture Explained [Exposure Triangle]
Aperture controls, camera exposure, your depth of field as well as how much light comes in through the lens of your camera.

Aperture on DSLR Cameras for both Photography and Video and how it is part of the Exposure Triangle, and what that means.

Aperture controls Depth of Field on your images, which can be achieved with a Wide Aperture like F/1.8 but it also controls how much light is being let in through the lens. A smaller or more narrow Aperture like F/16 will give you an image where the background is very detailed and in focus. This could be good for architecture and landscapes, or when shooting large groups.

When shooting portraits for photography or video where you want to separate the subject from the background, shallow depth of field and shooting with a wide aperture is ideal.

To compensate in photography you will use a lower ISO like ISO 100 or 200 and a higher shutter speed.

If you are shooting DSLR Video in Daylight with a wide aperture, a faster shutter speed will not be an option so you will need to make use of an ND Filter or a Variable ND Filter.

Hoya 52mm Variable ND Filter
Hoya 58mm Variable ND Filter
Hoya 72mm Variable ND Filter
Hoya 52mm ND Filter Set
Hoya 72mm ND Filter Set
Hoya 58mm ND Filter Set

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hey everybody this is roberto blake of robertoblake.com helping you create something awesome today so today's video I'm gonna talk a little bit about camera aperture for your DSLR camera and how that is part of the exposure triangle and what that all really means I'm gonna try and make it very simple and easy for you to understand even if you're a beginner with DSLR cameras proof video and photography so when we're talking about aperture we're talking about your camera lens we're talking about this right here so what happens when you have quote unquote a wider aperture means that the lens is opening up more like so step 1.8 or if it's going really small like this we're closer to f-22 now the reason that we go smaller to bigger with those numbers is because they're actually fractions so if you were at like f/2 you're not really at f/2 you're F you're at F 1 over 2 you're at 1/2 so that's part of the reason why those numbers are backwards and why the smaller the aperture is meaning the smaller this little ring here is the higher the number is because you have to think 22 slices of a pizza is a lot smaller than half of a pizza so that just gives you some perspective as to how the math works there so if you're trying to like figure out the numbers that's a better way of thinking of it now what this ultimately does is aperture controls really two things if you think about it because when it's wide like this more light can come into the lens that's the effect that has on your exposure the other thing that happens is this creates more shallow depth of field shallow depth of field which I will cover specifically in a whole nother video is when the subject is in focus and his tack sharp and the background and the rest of the area outside the focus begins to blur and drop off so that is shallow depth of field and I'm running some footage here as I talk so to get a better understanding of exactly what I'm talking about just visually instead of me just trying to explain it you'll get to see some samples here so that's what shallowed up the field is it's an effect that many of you want and having lenses that go to wide apertures like the prime 35 millimeter of 50 Miller in 85 millimeter lenses or being able to do F 2.8 with your higher priced zoom lenses like your 24 to 70 is how you get that effect when you have a wide aperture like that because it's letting more light in you have to compensate for the exposure in other ways primary example if you're shooting in daylight and shooting photography you might have that wide aperture open because you want that look but you'll also it'll be so bright that she'll have your ISO down maybe it's a 100 or 200 and then how do you go ahead and do you cut the rest of the light out when it's super bright outside and you're afraid of your images being overexposed at that point you'll have to raise the shutter speed to compensate or if that's not an option let's say you're shooting DSLR video and you know that you have to have a shutter speed of 1 over 50 because you're shooting 24 P then I would say that machine 24 frames per second you have to have a shutter speed of 50 you'll want to get a variable ND filter or an ND filter that can block out some of that light make the image darker still allow you to have that wide aperture and it's shallow depth of field this is what I do when I'm shooting some of my cosplay video stuff outdoors or any outdoor events I'll use an ND filter usually from Hoya I have links for the stuff in the description below we'll make some really good ones I wouldn't go with the cheaper ones and the reason is because when you want that shallow depth of field look it's also important for you to be able to autofocus properly if you get a cheap ND filter or even a cheap clear UV haze filter it can mess up the auto focusing on your lens and it can make it inaccurate so get the better more reliable stuff from tiffin and Hoya rather than an off-label brand so reducing the aperture number down to something like at 1.8 or F 2.8 can really help you shallow depth-of-field that could also help you in low-light situations to be able to you know go ahead and get more light into the lens and go ahead and get some great images I use this with night club photography especially where you have low-light situations or even for wedding photography when you're in door at a church or even my indoor product photography here I love to use this lens for that and I'll open up to maybe 2.8 f/4 to get what I need sometimes up 1.8 and that will really help you so Prime's are great for low-light situations because you can get the wider aperture out of them you can use the higher-end telephoto lens like the 24 to 70 14 to 24 you have 70 to 200 at F 2.8 and that will help you get wide apertures as well and that shallowed up the field that you need or the ability to get more light in low-light situations I hope you guys understand how aperture works a little better now I will be covering aperture shutter speed and ISO which all make up the exposure triangle so make sure you stay tuned for that I also have a video that goes through the exposure triangle all three parts of it kind of put together it will not be a compilation of these videos it will be its own video anyway if you have questions leave those in the comment section I'll try to answer as many of them as I can like this video if you liked it don't forget to subscribe check out the other awesome content on the channel as always you guys thanks so much for watching and don't forget create something awesome today

13 thoughts on “DSLR Camera Aperture Explained [Exposure Triangle]

  1. I figured out why aperture always said f–, the lens wasn't fully screwed on. That's also why I couldn't use autofocus lol I almost payed a camera shop to fix a ridiculously simple problem. I can now pay attention to techniques and enjoy using my camera

  2. Could you recommend a good book to learn photography? I understand and appreciate the value of these tutorials but I'm also aware that a book can go deeper into stuff and it can be a lot more helpful if you get the right book from the start rather then the 2nd or 3rd time. Great video, thanks!

  3. I really enjoy your videos man! You're helping everyone with quality improvement, and that's probably the most important aspect of what people are choosing to do, whether it be film making, graphic designing, or whatever! Please, keep up the amazing work.

  4. Great video explaining aperture. Still practicing remembering those numbers but you made it click for me with this video. So Thanks for that. Been gone for a minute. Just moved and set up my new studio in my new house. Can't wait til you do videos on ISO and Shutter Speed.

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