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Aperture: Starburst Effect

Lesson 14 from: Canon Lenses: The Complete Guide

John Greengo

Aperture: Starburst Effect

Lesson 14 from: Canon Lenses: The Complete Guide

John Greengo

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Lesson Info

14. Aperture: Starburst Effect

Next Lesson: Aperture: Flare

Lessons

Class Trailer
1

Class Introduction

07:11
2

Canon Lens Basics

14:12
3

Focal Length: Angle of View

11:31
4

Focal Length: Normal Lenses

09:43
5

Focal Length: Wide Angle Lenses

18:15
6

Focal Length: Telephoto Lens

21:27
7

Focal Length Rule of Thumb

15:36
8

Field of View

10:14
9

Aperture Basics

04:41
10

Aperture: Maximum Aperture

18:44
11

Aperture: Equivalent Focal Length

07:48
12

Aperture: Depth of Field

06:23
13

Aperture: Maximum Sharpness

08:33
14

Aperture: Starburst Effect

05:18
15

Aperture: Flare

06:48
16

Aperture: Hyperfocal Distance

19:32
17

Camera Mount System

14:57
18

Canon Lens Compatibility

14:26
19

Canon Lens Design

12:29
20

Canon Lens Composition

04:30
21

Canon Lens Shape

05:50
22

Canon Lens Coating

06:53
23

Canon Lens Focusing

14:10
24

Lens Autofocus

08:17
25

Canon Lens Image Stabilization

06:57
26

Canon L Lenses

10:18
27

Image Quality

09:46
28

Canon Zoom Lenses: Standard

17:50
29

Canon Super Zooms

05:20
30

Canon Wide Zooms

09:48
31

Canon Telephoto Zooms

16:09
32

Prime Lens: Normal Lenses

09:19
33

Prime Lens: Moderate Wide

07:01
34

Prime Lens: Wide Angle

05:33
35

Prime Lens: Ultra-Wide

09:23
36

Prime Lens: Short Telephoto

09:03
37

Prime Lens: Medium Telephoto

08:59
38

Prime Lens: Super Telephoto

13:59
39

3rd Party Lenses Overview

06:01
40

3rd Party Prime Lenses

15:25
41

3rd Party Zoom Lenses

26:28
42

Lens Accessories: Filters

33:42
43

Lens Accessories: Lens Hoods

09:58
44

Lens Accessories: Tripod Mount

04:51
45

Lens Accessories: Extension Tubes

04:30
46

Lens Accessories: Extenders

13:11
47

Macro Lens: Reproduction Ratio

18:59
48

Macro Lens: Technique and Choices

25:59
49

Fisheye: Technique and Choices

18:49
50

Tilt Shift: Techniques and Choices

27:08
51

Make a Lens System Choice

05:37
52

Choosing A Portrait Lens

17:21
53

Choosing A Sports Lens

17:31
54

Choosing A Landscape Lens

10:39
55

Best Lenses for You

08:46
56

Lens Maintenance

11:19
57

Buying and Selling Lens

11:15
58

What is John Greengo's Favorite Lens?

08:37

Lesson Info

Aperture: Starburst Effect

how about we lighten things up and have some fun? All right, let's talk about the starburst effect, and this is an impact of the aperture in the lens, which is why it's in this section. So if your if your brain is hurting a little bit, this is a little bit final, a bit easier to take hold up. And so when you point your camera at a bright light source, sometimes here, seen in Seattle, known as the Sun, we will get these rays of light coming out of the sun, which is have a nice little effect off cameras, and it is there for a particular reason, and we're gonna talk about how to create this and how toe implemented. Now it is kind of a nice little bonus. And if I do have these bright light sources and they could just be little lights that are, you know, here in the sidewalk that you can get to kind of pop out and it's just kind of a nice little extra thing to have in the photograph. So what's interesting is that this shape of these stars is different with the different lenses that you migh...

t use So you see how many different raise air coming out and the exact look to it depends on the lens, and in particular it has to do with the aperture in the lens. If you have a five bladed versus six plated versus seven bladed aperture, it's gonna change the look of the starburst in your image. So what's causing the starburst? Are these points where the blades meet at a very sharp angle? And so what's gonna happen is that you're gonna have a really strong concentration of light coming through reflected off of these blades in in the lens. Now, if you have five blades, what also happens is that it gets kicked in the opposite direction. So with an odd number of blades, you actually double the number of points you will see in your starburst. And so a five bladed aperture will result in 10 points with a six bladed aperture. Light will go out through those areas of intersection and what's in the opposite direction? Well, that's just another set of blades. And so what happens with a six played? It is, It kind of is intensifies because you kind of have double raise right on top of each other. And so that's going to be on Lee six points. And so you always end up with an even number of points, no matter how many blades that you have in your camera. But one of the things you can dio if your investigator if you're a lawyer, detective, is you can tell what lens was used, or at least you can tell how Maney aperture blades was used in a lens. So odd numbers a blades double the points, even number of blades keep the same number. And so here you can see different lenses shot in the same situation that have a different starburst pattern. Now is this a reason that I would buy a lens that it has a starburst pattern that I like? I like starburst, but not that much. Somebody might buy a lens because it's got the right number of blades on it, but it's just something Toby aware of so that you know how to use it in your photographs. Maybe you like that style. You know, I really like the Starburst here. Some other ones I don't like quite as much. It depends on the nature of that particular lens. Now, to create the Starburst, you need to be shooting at the correct apertures. And so I wanted to shoot a series of photographs at all different apertures to show you what the Starburst would look like. And so what we're gonna do is we're gonna shoot the series of photos and we'll clip out the starburst from each of these starting at F four working our way down to F 22. And one of the things that you'll notice is that the more you stop your lens down, the more the bigger the starburst, the more impact it's gonna have on it. And if you think about it, your aperture is closing down more. Those little cuts in the aperture become more and more significant on the light that's coming in the lens, and so you can see this starburst growing here. I think we'll be able to get down to F 22 here in a second. So here is a nice comparison of the different apertures and how far you need to go with those aperture settings in order to get that starburst. So you really need to stop it down to F 11 16 or 22 to get a pretty good effect out of it. Now, if you do want to do a starburst, things you need to do is first off, you need to find a bright light source. That's where the light's gonna be coming from either the sun or a fairly bright, small light source usually helps out. Stop the aperture down F 11 16 22. The more you stop it down, the more you're going to get that effect, and you need to obscure part of the light. And that's where we can really see. The light is if there is some sort of dark background member. In each of those cases where there was a starburst, there is something dark nearby so that that light has some. You need something dark behind it so that you can actually see where that light ISS, and it's gonna help out a lot using a wide angle lens. What's gonna what that's going to do? It is it's going to make the light source even smaller in the frame, and it's gonna improve that amount of starburst that you're going to get from it

Class Materials

Bonus Materials with Purchase

What's in the Frame? HD
What's in the Frame? LOW
Field of View HD
Field of View LOW
Lens Keynote Parts 1-4
Lens Keynote Parts 5-8
Canon® Lens Data

Ratings and Reviews

user-b3a96c
 

I so appreciate what a good teacher John is. I wish I would have known this much about lenses when I first started out buying my lenses. It was hard finding information about lenses. I didn't want to spend money on a lens I wouldn't use. The better understanding we have about our gear the better photographers we will be. I have never seen a class like this. Invaluable...yes I bought the class! I am really impressed with the high quality photography classes available on Creative Live!

Tami Miller
 

Have loved the other John Greengo classes I've watched & purchased - and this is another winner! Having been a high school/college science teacher, it is refreshing to take a course with someone who not only is extremely experienced, seems to be a computer having stored so much knowledge, but is equally concerned about making the information truly understandable to different levels. And he shares the information using every tool he can: slides, video, interactive presentations, and great quizzes. I learned so much about my Canon lenses - and lenses in general with their many components. I am excited about testing each of mine to see what macro ratio they handle, and especially appreciated the tutorial on testing each for their specific quirk that affects super sharpness. This class is great whether you own Canon lenses or not. Thanks John Greengo!

Abbeylynne
 

This was a great class not just about the lenses that Canon offers but also how each lens works. As usual, John's slides are alway informative and entertaining. There is a phrase: John has a slide for that! I am not even a Canon user and found this class to have great information for the use of each specific lens. Great work John! Thank you Creative Live for another great class!

Student Work

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