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Exposure

Lesson 5 from: iPhone Photography & Mobile Photography

Philip Ebiner

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Lesson Info

5. Exposure

Next Lesson: Focal Length

Lessons

Class Trailer

Course Introduction

1

Welcome to Class

00:50
2

Why Are Smartphone Cameras Awesome?

02:10
3

The Course Challenge: Capture Your Day in 5 Photos

09:03

Camera Basics for Mobile & Smartphone Photography

4

Intro to Camera Basics

01:14
5

Exposure

03:56
6

Focal Length

01:46

Lesson Info

Exposure

So one of the most basic terms in photography is exposure. Now, typically, we have three variables for finding exposure that's iso your aperture and your shutter speed. Now, when talking about mobile photography, we can't necessarily control all those three things depending on your phone. But let's talk about what those are. So we can get a good understanding of finding exposure. Typically using those three variables, we use a triangle. Now, let's just talk about what they are iso iso is the sensitivity of your sensor. That means how sensitive uh your sensor is to light. Meaning if it has a higher iso or it's more sensitive, you'll be able to gain more light onto your image. If you have a lower iso and is less sensitive, your sensor will be less sensitive to light, which means you need more light to get your image to exposure aperture or F stop. That is typically the hole or the area that light is allowed into your lens. Now, you either have a large hole or you have a small hole. So wh...

en talking about measuring your aperture or your F stop, we typically use numbers. Now these numbers aren't necessarily uh typical towards measuring other things. They're very specific to F stops and apertures. Some numbers for F stops would be something like 1.8 24568, 1116 and 22. Those are sometimes also called uh with an F in front of them. So F 2.8 F four F eight, that way it distinguishes between any other measurement on your camera. The F stop is also your aperture. Now, what do those numbers mean? The lower the number, the bigger the hole or the more light that comes in, the higher the number, the smaller the hole, the less light that comes in. So let's talk in extremes. An F-16 was a very small hole and will let not very much light in an F two is a larger hole and will let more light in. So in smartphone photography, we don't necessarily have control over your F stop, but it will come across in some phones where you can actually see what F stop you're using shutter speed is the speed at which you open and close your shutter. Now, typically in photography and normal cameras, the shutter opens and closes and allows light to come in your speed is how long you leave that shutter open. So obviously, if you leave it open for a longer time, your shutter speed is lower and you're letting more light in if you open and close it quickly, meaning you're only opening it for a little bit of time, your shutter speed is higher, mostly because we measure shutter speeds in fractions. A fast shutter speed would be 2/1000 of a second. A slow shutter speed would be like 30th of a second. And you can measure those on a camera to work in junction with your F stop and your iso this is when the exposure triangle comes in these three variables. Again, iso one F stop and aperture. That's two and three shutter speed will allow you to create a nicely exposed image, adjusting all three things based on what your situation is and what you want to achieve creatively will allow you to create that good exposure. So all these three things are central and important to photography as a whole. Now, that's photography across the board. When we're talking about mobile photography, you are limited to what you can actually control and not control. When you're taking photos. There are actually apps that will allow you to get into your system and some cameras and some phones where you can control all these things. But honestly, across the board, typically, you can't necessarily control all these things with your mobile photography. However, it is important to understand what these things are so that when you can control them, when they come across, you can use them creatively.

Ratings and Reviews

Joanna
 

Definitely geared to beginners, but the class has a lot of good information. As an advanced camera photographer still trying to get to know my phone camera better, I learned a few things I didn't know (like you can use portrait mode for selfies, what hyper lapse is and the VSCO app). Nice job!

user-d195e3
 

Good course for everyone starting out and needed to have some more basic info beyond the common snap shot. I had wished for more info on using mobile in the more professional field like when switching from camera to mobile. Additional lenses and flashes and things like that. But this course was obviously not targeted at this. So overall still a nice brush up.

Barbara
 

Great class. Well organized and clearly presented. Would be very good for beginners and mid level users. highly recommend.

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