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DOF Preview & Focusing Screens

Lesson 48 from: Fundamentals of Photography

John Greengo

DOF Preview & Focusing Screens

Lesson 48 from: Fundamentals of Photography

John Greengo

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Lesson Info

48. DOF Preview & Focusing Screens

Lessons

Class Trailer
1

Class Introduction

23:32
2

Photographic Characteristics

06:46
3

Camera Types

03:03
4

Viewing System

22:09
5

Lens System

24:38
6

Shutter System

12:56
7

Shutter Speed Basics

10:16
8

Shutter Speed Effects

31:57
9

Camera & Lens Stabilization

11:06
10

Quiz: Shutter Speeds

07:55
11

Camera Settings Overview

16:12
12

Drive Mode & Buffer

04:24
13

Camera Settings - Details

10:21
14

Sensor Size: Basics

18:26
15

Sensor Sizes: Compared

24:52
16

The Sensor - Pixels

22:49
17

Sensor Size - ISO

26:59
18

Focal Length

11:36
19

Angle of View

31:29
20

Practicing Angle of View

04:59
21

Quiz: Focal Length

08:15
22

Fisheye Lens

12:32
23

Tilt & Shift Lens

20:37
24

Subject Zone

13:16
25

Lens Speed

09:03
26

Aperture

08:25
27

Depth of Field (DOF)

21:46
28

Quiz: Apertures

08:22
29

Lens Quality

07:06
30

Light Meter Basics

09:04
31

Histogram

11:48
32

Quiz: Histogram

09:07
33

Dynamic Range

07:25
34

Exposure Modes

35:15
35

Sunny 16 Rule

04:31
36

Exposure Bracketing

08:08
37

Exposure Values

20:01
38

Quiz: Exposure

20:44
39

Focusing Basics

13:08
40

Auto Focus (AF)

24:39
41

Focus Points

17:18
42

Focus Tracking

19:26
43

Focusing Q&A

06:40
44

Manual Focus

07:14
45

Digital Focus Assistance

07:35
46

Shutter Speeds & Depth of Field (DOF)

05:18
47

Quiz: Depth of Field

15:54
48

DOF Preview & Focusing Screens

04:55
49

Lens Sharpness

11:08
50

Camera Movement

11:29
51

Advanced Techniques

15:15
52

Quiz: Hyperfocal Distance

07:14
53

Auto Focus Calibration

05:15
54

Focus Stacking

07:58
55

Quiz: Focus Problems

18:54
56

Camera Accessories

32:41
57

Lens Accessories

29:24
58

Lens Adaptors & Cleaning

13:14
59

Macro

13:02
60

Flash & Lighting

04:47
61

Tripods

14:13
62

Cases

06:07
63

Being a Photographer

11:29
64

Natural Light: Direct Sunlight

28:37
65

Natural Light: Indirect Sunlight

15:57
66

Natural Light: Mixed

04:20
67

Twilight: Sunrise & Sunset Light

22:21
68

Cloud & Color Pop: Sunrise & Sunset Light

06:40
69

Silhouette & Starburst: Sunrise & Sunset Light

07:28
70

Golden Hour: Sunrise & Sunset Light

07:52
71

Quiz: Lighting

05:42
72

Light Management

10:46
73

Flash Fundamentals

12:06
74

Speedlights

04:12
75

Built-In & Add-On Flash

10:47
76

Off-Camera Flash

25:48
77

Off-Camera Flash For Portraits

15:36
78

Advanced Flash Techniques

08:22
79

Editing Assessments & Goals

08:57
80

Editing Set-Up

06:59
81

Importing Images

03:59
82

Organizing Your Images

32:41
83

Culling Images

13:57
84

Categories of Development

30:59
85

Adjusting Exposure

08:03
86

Remove Distractions

04:02
87

Cropping Your Images

09:53
88

Composition Basics

26:36
89

Point of View

28:56
90

Angle of View

14:35
91

Subject Placement

23:22
92

Framing Your Shot

07:27
93

Foreground & Background & Scale

03:51
94

Rule of Odds

05:00
95

Bad Composition

07:31
96

Multi-Shot Techniques

19:08
97

Pixel Shift, Time Lapse, Selective Cloning & Noise Reduction

12:24
98

Human Vision vs The Camera

23:32
99

Visual Perception

10:43
100

Quiz: Visual Balance

14:05
101

Visual Drama

16:45
102

Elements of Design

09:24
103

Texture & Negative Space

03:57
104

Black & White & Color

10:33
105

The Photographic Process

09:08
106

Working the Shot

25:29
107

What Makes a Great Photograph?

07:01

Lesson Info

DOF Preview & Focusing Screens

For those of you with SLR cameras most of you have the option of a depth of field preview button. When you look through the viewfinder the aperture is completely open so that you can see the brightest, easiest view so you can manually focus. But if you're shooting a picture at f/ it's gonna be completely different when that aperture stops down and you get a whole bunch more depth of field. So a long time ago professional cameras put on a depth of field preview button over on the side. It is now migrated all the way down to some of the entry levels, not all of the entry levels but some of the entry level cameras will have this little hidden button down on the side. And when you press it normally in the viewfinder you get this shallow depth of field look. Because that's what you're gonna see with the lens wide open. When you press it in it closes the aperture down and when you look through the viewfinder it's gonna give you a really dark image. Now most people who see this for the first ...

time, when you're explaining it to them, they always say the same thing, I can't see anything, it got dark. Let your eyes adjust, take a moment for your eyes, to pupils adjust and then you'll see that you're actually getting more depth of field. Do you see how much is in focus? Oh, I see it now, and so you press the button in, you wait for a second or two for your eyes to adjust and then you can see how much depth of field you're gonna get. Now back in the days of film this was really important 'cause you didn't know how much depth of field you were getting until you got your film back from the processor. Now with digital cameras this is kind of useless because if you wanna see how much you get in focus just shoot a picture and look at it. The fact of the matter is though, if you're using an SLR, it's hard to see the back of the camera in bright sunlight. And so for a landscape photographer who's got a lot of light that they're working with, it's nice to hit that depth of field preview to see if those flowers in the foreground are in focus with the mountain in the background. And so it's a handy little device. Now those of you with mirrorless cameras, you may want to do a little experiment. Don't take a picture of yourself but hold the camera pointed at yourself and press halfway down. When it presses halfway down some of the cameras will do an automatic depth of field preview for you. I believe Fujis will do this. So when you press halfway down, you hear a little noise, the aperture stops down. Other cameras don't stop down until the actual picture is taken and this may even be a feature that you can turn on and off on your camera. But you will get this as an option on some mirrorless cameras if you look for it in that manner. Now for those of you with SLRs and any of you that have very fast lenses, there is an important little secret change that has happened in cameras over the years when we went in to auto focus. The focusing screen in your camera, in past cameras, actually used to be replaceable and you used to be able to interchange it and you could exchange it for one with grid lines or had a special focusing mark on it. And there was also some ones that were brighter than normal. And you could change these but now there are no current model of cameras where you can change the focusing screen anymore, they've all disappeared from the market. What you get in the camera is it. And when we went to auto focus they had to change or they chose to change the type of focusing screens that are in the cameras. And it's because there was a new demand for these small, lightweight, slow lenses. And in order for them to work they needed to change the way these focusing screens were in the camera. And they made them more bright, less accurate. And so we traded accuracy so that we could actually see our subjects. I don't know if anybody remembers the old film cameras but if you remember film cameras with a slow lens, at that point it was like an f/4 lens, and you didn't get your eye right in the middle everything got really dark. The thing was, it was accurate but it was dark. And so now we're choosing brightness over accuracy. And what that means for the person who uses an SLR camera is that if you use a fast lens, anything faster than 2.8, the camera in the viewfinder will not show you the proper shallow depth of field that you are likely to get. So if you have a 1.4 lens you look through the viewfinder and you go, okay, yeah I see how much depth of field I'm gonna get and then you shoot it at 1. and you're gonna get even shallower depth of field. And so this focusing screen changes what you are seeing in the amount that you're gonna get by the depth of field. And so for anyone with a very, very wide open aperture it's gonna look different in the final picture than it does through the viewfinder. Take a look, do your own tests. It's true so check it out.

Class Materials

Bonus Materials with Purchase

Fundamentals of Photography Class Outline
Learning Projects Workbook
Camera Keynote PDF
Sensor Keynote PDF
Lens Keynote PDF
Exposure Keynote PDF
Focus Keynote PDF
Gadgets Keynote PDF
Lighting Keynote PDF
Editing Keynote PDF
Composition Keynote PDF
Photographic Vision Keynote PDF

Ratings and Reviews

a Creativelive Student
 

Love love all John Greengo classes! Wish to have had him decades ago with this info, but no internet then!! John is the greatest photography teacher I have seen out there, and I watch a lot of Creative Live classes and folks on YouTube too. John is so detailed and there are a ton of ah ha moments for me and I know lots of others. I think I own 4 John Greengo classes so far and want to add this one and Travel Photography!! I just drop everything to watch John on Creative Live. I wish sometime soon he would teach a Lightroom class and his knowledge on photography post editing.!!! That would probably take a LOT OF TIME but I know John would explain it soooooo good, like he does all his Photography classes!! Thank you Creative Live for having such a wonderful instructor with John Greengo!! Make more classes John, for just love them and soak it up! There is soooo much to learn and sometimes just so overwhelming. Is there anyway you might do a Motivation class!!?? Like do this button for this day, and try this technique for a week, or post this subject for this week, etc. Motivation and inspiration, and playing around with what you teach, needed so much and would be so fun.!! Just saying??? Awaiting gadgets class now, while waiting for lunch break to be over. All the filters and gadgets, oh my. Thank you thank you for all you teach John, You are truly a wonderful wonderful instructor and I would highly recommend folks listening and buying your classes.

Eve
 

I don't think that adjectives like beautiful, fantastic or excellent can describe the course and classes with John Greengo well enough. I've just bought my first camera and I am a total amateur but I fell in love with photography while watching the classes with John. It is fun, clear, understandable, entertaining, informative and and and. He is not only a fabulous photographer but a great teacher as well. Easy to follow, clear explanations and fantastic visuals. The only disadvantage I can list here that he is sooooo good that keeps me from going out to shoot as I am just glued to the screen. :-) Don't miss it and well worth the money invested! Thank you John!

JUAN SOL
 

Dear John, thanks for this outstanding classes. You are not only a great photographer and instructor, but your classes are pleasant, they are not boring, with a good sense of humor, they go straight to the point and have a good time listening to you. Please, keep teaching what you like most, and I will continue to look for your classes. And thanks for using a plain English, that it's important for people who has another language as native language. Thanks again, Juan

Student Work

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