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welcome everyone I'm Laura Shoe in this video I'm going to talk about
chromatic aberration
what it is and how to fix it it sounds very technical and intimidating
but really it has a very simple fix I'm going to go ahead and zoom in
on the site of the shipwreck here first I'll start out
at one to one now at one to one I can see color fringing
along edges here but you may not be able to see it in the video
so I'm a zoom all the way into to 4 to 1 so this red and cyan and blue and yellow
fringing
is chromatic aberration it's a flaw of my wide angle lens
within the plane of focus my lens has focused the different wavelengths of
light
at different positions so they're offset here they're not lined up properly
if your lens has this issue you're going to see it on all photographs taken with the
lense
and you gonna see it towards the edges of your photos rather than in the
center
if I move in the navigator panel to the center of this photo
we don't see that color fringe so let me go back to the side here
and show you how to fix it we'll fix it in the lens corrections panel
so I'll open that up and in Lightroom 5
the fix will be on the basic panel in Lightroom 4 it would be on the profile
panel
we'll simply check the box that says remove chromatic aberration
and it's magically gone in Lightroom 3
you had to use sliders to accomplish the fix but the Lightroom 4 and five
checkbox
works really well even though it does work well it's not
a perfect substitute for a better quality lens
let me show you this other photo here I'll zoom out to show you the photo
and then I'll zoom back in on an edge here
and you can see this photo has chromatic aberration it's photographed with the
same lens
so I'll remove chromatic aberration here and the color fringing goes away
but notice that they're still a halo along this
edge here now in this particular photo it's very obvious
because I've darkened the blues in the sky if I go back up to the HSL panel where
I did that
and I undue my darkening of the blues in the photo
then I can't see that halo so if you're fixing chromatic aberration
there will be some limitations on what you can do to areas
that have that fic applied okay let me go back to this
other photo one more time to show you that there's
actually a second type of color fringing
in this particular photo this purple fringing
results from photographing a subject against an extremely bright background
this is also fixed down here in the lens corrections panel
but instead of going to the Basic tab I would go to the color tab
we can also fix green fringing here in the color tap
purple and green fringing can also occur if you're photographing with a very
shallow depth-of-field
as you move away from the plane of focus in your photo
you'll see this fringing I'll provide a link to a video that goes into the
sliders in more depth
but for now a quick on the eyedropper tool and I'll sample in the purple
and Lightroom or remove that purple fringing we're seeing a little bit a
purple artifact here
but keep in mind that we're at 4 to 1 and we'll never see this level of detail in a print
go to 1 to 1 and you can see that we're in great shape
okay so this concludes the lesson on chromatic aberration
if you've enjoyed this video subscribe to my YouTube channel
and check out my Lightroom blog at www.laurashoe.com