All language subtitles for 92 - Transform Panel

In this lecture will be exploring Light
ROOM's Lens Correction Adjustment Panel.

So let's go ahead and expand. It

will begin by discussing the role of lens

corrections in why you might need them.

Sometimes when you take a photograph,
your camera lens

will create lens aberrations
such as geometric distortions,

chromatic aberration
and barrel distortion.

Lightroom
has several built in lens profiles

that can help correct
these types of issues automatically.

We can use the Lens Correction Panel
to do manual

adjustments
to try to rectify these aberrations

with that said,
let's get right into our adjustment panel.

Please make sure you click on Profile
to begin with.

One of the first checkboxes that we have
here is the Enable Profile Corrections.

This checkbox deals specifically
with barrel or pincushion distortion.

This illustration gives an example
of what this type of distortion

can do to your image.

It can make you look
either convex or concave.

We can correct this by

selecting our cameras lens profile
from the profile tab.

So I'm going to go ahead and first place
a checkmark here

and under the lens
profile, we'll need to find the profile

that matches the lens
that we used to photograph this image.

So here
Lightroom is detected that the canon EF 24

to 105 millimeter lens was used,
so it's already detected the lens.

Don't worry if Lightroom isn't able
to find your lens profile

or for whatever reason,
you're not able to find it in this list,

because in a moment, we're going to show
you how to work with manual corrections

using the Manual Adjustments panel here.

For now, we're just looking
at the automated methods.

Now. Let's go ahead and see the before
and after.

This is before the correction.

And this is with the correction,
with the lenses correct profile,

you can see that
a very slight adjustment was made

and in

some cases you will definitely experience
a more significant change.

So once you've specified your camera lens,
you can make further manual adjustments

using the distortion in vignetting
sliders, the distortion slider

attempts to correct pincushion
or barrel distortion.

The Vignetting slider will add or remove
vignetting around the edges of the image.

So let's take a look at the distortion
slider first.

You can see what's happening there

as I move the slider from left to right.

So it's not a very dramatic change,
but it does attempt to remove

very small amounts of pincushion
or barrel distortion.

Now, the Vignetting slider

key, again,

not a very dramatic change at all.

If I move the slider to the left,
you can see the vignetting effect

that's created on the edges of the image.

And this is an inverted vignetting effect.

If I move the vignetting slider
all the way to the right,

you can see it really lightens
the edges of the photograph.

So the next option here we have is to
remove chromatic aberration automatically.

Chromatic aberration
is also known as color fringing.

It occurs when a lens is unable
to focus all the colors

of an object to the same convergence
point on the image sensor.

So this can cause glow.

This can cause a glow
to appear around parts of an image.

And I'm going to zoom in
just so I can show you.

Okay, so here we have a little bit of it

going on a zoom
in even more so you can see a better

so that right there,

that little glow effect
that you see at the edges

of some of these buildings.

Let's go ahead and click the remove

chromatic aberration
automatically and see what happens

here. So not much happened there at all.

That tells us that we'll
probably need to do this manually now,

since we weren't able to get rid
of the chromatic aberration automatically,

we're going to go over to the manual tab.

And here we have a color picker
next to the label de Fringe.

Go ahead and select that color picker.

Now click
the color of the chromatic aberration.

So I'm going to go ahead
and click this color here.

And you can see that
Lightroom removed a little bit of it.

I might have to find
a more suitable color,

but you do have to be careful
because if you click a color

that is quite overly represented
in the other parts

of the image, you're going to start
affecting other parts of the image.

Okay, so there we go that

remove a lot of the purple
hue in the edges around the building.

And so that was the goal.

So I'm going to put this color
picker back.

If you don't want to use the color picker
for color selection or if you feel it's

not doing a good job for you,
you can always toggle these sliders here.

You go back and forth.

So the amount just controls the intensity

of the removal and chromatic aberration

normally consists of a purple
hue in a green you.

And so you can play around with the amount
on each one of these hues.

If you want to impact the purple hue,
you can use this slider here

so you can see the difference there.

It's quite significant.

If you want to impact the

green hue,
you're going to use this slider here.

And so there's not much green in there,

especially after we've removed the purple.

And so that's about as good as we can
probably get it.

So I'm going to go back
to fit in my navigator.

So in addition to FRINGING,
we can also adjust the distortion level

and the distortion setting over
here is the same thing

as the profile correction,
except we're doing it manually.

So what we're trying to do here
would be to remove

the pincushion or barrel distortions.

Now, to reduce pincushion, you would drag

the slider to the left

and to repair barrel distortions.

You would drag the slider
over to the right.

Now the constrain crop checkbox.

See, for example, I move this slider
all the way to the right.

You'll notice that I start

getting a white background there.

The constrained crop will make sure that

when I do my distortions,
I don't get that white backdrop.

It makes the image take up the full width

and length of the preview area

and we can also add manual vignetting.

So if you want to add
some vignetting here, you can.

The midpoint controls

how far the vignetting effect travels
towards the center of your image.

So remember that
the vignette is a gradient

that goes from a dark shadow
to a much lighter shadow.

In that gradient

effect, the length of its travel
can be controlled by the midpoint slider.

Sorry, the midpoint slider.

Okay.

And that's how we control distortions
in an image.

And in the next lesson,
we'll work with the Transform panel.