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
Canon Lens Composition
so beyond kind of the standard glass can and developed ultra low dispersion glass. And so dispersion is when light hits a lens and it disperses it goes off somewhere else. And we don't like that because we're losing that light source. Okay, so they designed ud glass to correct for this chromatic aberration of light hitting glass and kind of taking off doing its own thing. And so there's a full list of lenses. And for those of you who by the class and get the pdf, you don't have to write all these numbers down. You go back and you can just look at this slide number and you can pull up the whole list of these air lenses that have ud glass and one of the things I really want to make sure getting this list right current and up to date of which ones have all this in here. So this is a significant improvement over normal glass because image quality, less chromatic aberration, less dispersion of the glass as we shooting images, improved contrast, improved sharpness because of this type of gla...
ss that is in there and there's a type of class we're going to talk about next called fluoride, and this is a much cheaper glass to use in that. So it's a relatively affordable way of improving the quality of the glass of our lenses. Now, this is originally called you D, and they have since made subsequent improvements to it and they now call it Super You d class. And so, if you see super you d that's this higher in type glass. But then along came fluoride. Alright, So fluoride is a rare earth element and it isn't in a fairly elite collection of lenses that you'll see listed here on the left of your screen. And fluoride is a rather interesting element is that you're going to get pretty much know chromatic aberration at all if you use it Excellent. Let's put in all of our lenses. One fluoride element has the power of to you d elements. Awesome. We just saved money and wait by reducing the number of elements in our lands, we're gonna make our land smaller now because we're using these fluoride elements. This is great news. Love to hear about this new technology. Very low refractive index, so refract Okay, what is refract reflect and we all know what reflect ISS. We see our reflection in a mere light bounces off of a surface. Okay, When you react to something, what happens, move along. Something happens. Okay, React to that. All right, So when light hits glass dispersion refraction, it takes often into a different direction. Very low refractive index, which means the light is going where it's supposed to go very low dispersion. This is all sounding really good. Here's a problem. Natural fluoride is too small for photographic lenses. So when you find natural floor, I I don't know what exactly looks like, but it's too small to just grind it and put it in a lance. It will work out for certain types of small microscopes, but it's not big enough toe work put in a regular lens. So Canon grows their own synthetic fluoride crystals that they put in their lenses. So in case you're wondering, why does this 200 to 400 lens cost $10,000 because they're growing Gloria class crystals to put in your lands? How long does that take? I don't know, but it can take quite some time. I know there are certain lenses that take more than 18 months from the beginning of the lens curing process. And so sometimes they're working on these lens elements, and they're in bats and heating up and cooling down, going through cycles for weeks at a time. And it takes four times longer to grind a fluoride element than it does a U. D or a standard glass element. They're very fragile, and they could be broken. And so they have to be able to be mounted in very strong lenses so that they don't get moved in the wrong way. And so imagine if you're breaking four times the amount of glass every time you're trying to grind it. That's gonna increase the cost of that lens quite a bit. And so the lenses, as I say, this is a pretty lofty line of lenses that are using these fluoride elements, but you will see it listed as one of the elements that is part of that lens design
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!