Lessons
Class Introduction
07:11 2Canon Lens Basics
14:12 3Focal Length: Angle of View
11:31 4Focal Length: Normal Lenses
09:43 5Focal Length: Wide Angle Lenses
18:15 6Focal Length: Telephoto Lens
21:27 7Focal Length Rule of Thumb
15:36 8Field of View
10:14Aperture Basics
04:41 10Aperture: Maximum Aperture
18:44 11Aperture: Equivalent Focal Length
07:48 12Aperture: Depth of Field
06:23 13Aperture: Maximum Sharpness
08:33 14Aperture: Starburst Effect
05:18 15Aperture: Flare
06:48 16Aperture: Hyperfocal Distance
19:32 17Camera Mount System
14:57 18Canon Lens Compatibility
14:26 19Canon Lens Design
12:29 20Canon Lens Composition
04:30 21Canon Lens Shape
05:50 22Canon Lens Coating
06:53 23Canon Lens Focusing
14:10 24Lens Autofocus
08:17 25Canon Lens Image Stabilization
06:57 26Canon L Lenses
10:18 27Image Quality
09:46 28Canon Zoom Lenses: Standard
17:50 29Canon Super Zooms
05:20 30Canon Wide Zooms
09:48 31Canon Telephoto Zooms
16:09 32Prime Lens: Normal Lenses
09:19 33Prime Lens: Moderate Wide
07:01 34Prime Lens: Wide Angle
05:33 35Prime Lens: Ultra-Wide
09:23 36Prime Lens: Short Telephoto
09:03 37Prime Lens: Medium Telephoto
08:59 38Prime Lens: Super Telephoto
13:59 393rd Party Lenses Overview
06:01 403rd Party Prime Lenses
15:25 413rd Party Zoom Lenses
26:28 42Lens Accessories: Filters
33:42 43Lens Accessories: Lens Hoods
09:58 44Lens Accessories: Tripod Mount
04:51 45Lens Accessories: Extension Tubes
04:30 46Lens Accessories: Extenders
13:11 47Macro Lens: Reproduction Ratio
18:59 48Macro Lens: Technique and Choices
25:59 49Fisheye: Technique and Choices
18:49 50Tilt Shift: Techniques and Choices
27:08 51Make a Lens System Choice
05:37 52Choosing A Portrait Lens
17:21 53Choosing A Sports Lens
17:31 54Choosing A Landscape Lens
10:39 55Best Lenses for You
08:46 56Lens Maintenance
11:19 57Buying and Selling Lens
11:15 58What is John Greengo's Favorite Lens?
08:37Lesson 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
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!