Lens Aberration Correction
John Greengo
Lessons
Class Introduction
12:55 2Photo Basics
04:03 3Basic Camera Controls
03:33 4Exposure Modes
20:29 5Top Deck Additional Features
05:29 6Exposure Bracketing
04:14 7Exposure Compensation Metering And Flash
18:50 8Viewfinder
12:31Live View And Movie Mode
23:52 10Autofocus Area
10:16 11Quick Menu
03:48 12Play Back
06:13 13Memory Cards
06:33 14Left And Right Of Camera Features
04:48 15Bottom And Front Of Camera Features
03:23 16Lenses
07:35 17Shooting Menu
10:45 18Lens Aberration Correction
04:31 19Multiple Exposure And Image Type
07:06 20ISO Speed Settings And Noise Reduction
10:22 21Mirror Lockup And Dust Delete Data
03:43 22External Speedlite Control And Anti Flicker
06:36 23AF Method Shutter And Metering
04:45 24Movie Menu
11:36 25AF Menu
23:09 26Playback Menu
07:43 27Setup Menu
24:13 28Custom Functions Menu Part 1
14:28 29Custom Functions Menu Part 2
19:48 30My Menu
05:04 31Camera Operation
09:47Lesson Info
Lens Aberration Correction
Lens aberration correction. So this is another one of the image manipulation modes and let's look at what the options are in this sub-menu. So first off is Peripheral Illumination and this is going to fix the problem that you sometimes get with either very fast lenses, or very wide lenses as we can see in this example here. This was shot with the 11 to 24 millimeter lens I think at 11, and you can see how the corners are much darker than the middle of the frame, and this is very common with very wide angle lenses. And so if you turn this particular feature on, it will correct for that feature - and now let me jump back and forth between these two - it will correct for that feature on JPEG images. It will not fix it on raw images but it will fix it on JPEG images, and it will fix it at least in camera as far as what you look at on the back of the camera. And so this is a feature that you can turn on but is of limited use when you are using raw images, and you can see how much impact it ...
has there on an image. Thing is is that sometimes people like adding that vignette effect to their images and so it's something that I often add to my images when I'm shooting people photographs, and I wanna draw the attention away from the corners, and so I wanna darken those corners up a little bit. And so there are many photographers and many styles where you don't care about Peripheral Illumination Correction at all; you're perfectly fine with the natural vignette of the lenses. And so, some people may wanna leave this turned on, some people may want it turned off. Now as we go through this part of the class, I will be making general recommendations and I will also have advanced recommendations where maybe more advanced users might prefer to have their settings, and these are, these are good starting points for people, this is your camera, I want you to customize it the way you like it, any way you need it, and so I'm just trying to give people a starting point if they're not sure on where to set it at. And so I know many of the more advanced photographers just like to get the natural look from the lenses, and they'll fix it later if they need to in Lightroom, Photoshop, or whatever program. Chromatic Aberration is a problem that nobody really likes to deal with, and this happens when you have a very bright background and light kinda comes around solid objects. It creates a halo that has a distinctive color, either blue or red color to it, and this has been a problem with digital, pretty much all digital cameras, and the lenses try to correct for this, and the cameras wanna try to correct for it with a feature like this is in Chromatic Aberration. And so once again, this will only fix it on the JPEGs but nobody really likes this on their images and so this is something that most people are gonna wanna leave turned on. Distortion Correction is gonna deal with lenses that have a little bit of distortion to it. And so as good as the lenses are sometimes they have a little bit of distortion. This image here has distortion. Let me go back and forth between the corrected image and the before image, and you can see that there's a little bit of distortion in this wide angle shot. And so you can fix that once again on JPEG images only; it does not fix it on raw images. If you wanna fix it on a raw image, you'll either need Canon software or some of the other post-production software. Diffraction Correction, this is a new one that we haven't seen on many Canon cameras, I think this may be the only one, maybe the 5D Mark IV will have it as well, and it'll probably be on future cameras. So when you stop down to f/22 to get maximum depth of field, there is a diffraction problem that causes a loss of sharpness, and the camera will go in and add a little bit extra sharpness, will sharpen that image up if you are shooting at those really small apertures, and it's not a huge difference but I can see that the image on the right has more sharpness than the one in the middle. And so this is something that does work once again, only on JPEGs, doesn't work on raw images. And so, that extra sharpness looks pretty good to me, it's not over sharpened, and so I'm recommending at keeping that turned on. So that's our little sub-menu of fixing little lens problems.
Class Materials
Ratings and Reviews
Fred Innamorato
John does a great job as usual. He provides so many visual aides and demonstrations which really helps you understand how to operate and set up your camera. His step by step explanation of the entire menu and each tab is excellent. In addition to his many photography tips and instructions. What an excellent class and a great value for all the detailed instructions provided. Much better than the manual you get in the box. Plus you get to watch this as many times as needed. I highly recommend this course and all of John's other classes.
Joe Berkeley
I quite enjoyed John's course on the 1DX mark ii. To be frank, I should have taken it 122,000 shots ago when I bought the camera. I learned quite a bit. There were only a few occasions when I thought my cranium could explode. But I walked away from the course with some great tips and in the grand scheme of things, the money I invest in education is always more valuable than the latest and greatest camera strap, lens, or bag. It will probably take a few months for all of the information to sink in but I'm feeling good about what I learned and the price I paid for it. All in all, a good value.
Ian Sherratt
Great video. Loved the clear explanations, great views and mixture of video and slides. Iāve read a lot of manuals and books on settings and use of various Canon cameras but this is the first time Iāve really understood the full range of functions.
Student Work
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