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>> DAVID MALAN: So I'm here with CS50's
own Dan Coffey jogging along the Charles

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River on Harvard's campus.

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Now, if Dan were just using
a camera to shoot this,

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the image would be pretty
shaky, definitely not stable.

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But he's using a technique called image
stabilization, which should hopefully

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be stabilizing the image.

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Can we shoot the rest of this inside?

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OK, image stabilization.

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What is it and how does it work?

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DAN COFFEY: So for many years,
the TV and film industry

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have been trying to get more dynamic
shots by introducing movement,

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but it's a challenge to
keep them stabilized.

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You've seen the West Wing, maybe,
where they do the walk and talk shot.

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And basically, what they use
for that is a Steadicam, which

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is a big rig that you wear.

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It's a vest with an arm that
isolates the camera from the user

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and counterbalances it
with a series of weights.

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But it takes a really
long time to set up

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and it's very complicated
to actually use.

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>> There are new developments
in software that you

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can use where you can make adjustments
in Mac or PC, which sometimes work.

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Sometimes they don't.

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But one of the latest
developments is actually this.

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This is the MoVI M10.

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It's a really neat piece of equipment
from our friends at Freefly Systems.

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And basically, it uses a series of
gimbal axes to stabilize your camera.

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DAVID MALAN: What's a gimbal?

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DAN COFFEY: So a gimbal is a set of
rings that each spins on its own axis

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and basically isolates each direction,
either the x, the y, or the z,

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and really just makes it
very smooth and fluid.

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So this M10 is a large gimbal
and has three axes on it.

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One here for the tilt.

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It's got one in the back for the
roll and one up top for the pan.

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And I can actually show you if you
want to see how these actually work.

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>> So if you look here in the software,
this is the Freefly configurator.

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And it's basically outputting
diagnostic information right now.

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You can see we have motor tilt,
motor roll, and motor pan.

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And as I actually pan
the camera, you're going

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to see the blue lines
start to go up and down.

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DAVID MALAN: OK, so
that represents the--

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>> DAN COFFEY: It's the resistance of
the motor pushing back against me,

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because the antennae always wants to
come back to rest in the same position.

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>> DAVID MALAN: OK, so the taller, the
lower the bar, the more resistance.

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DAN COFFEY: Yeah, the more intensity
that the motor is using to fight tilt.

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You can see the red
line do the same thing.

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And then roll.

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>> DAVID MALAN: The green
line, up and down.

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>> DAN COFFEY: So these are the three
axes we're stabilizing against.

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And so this is not normally
how you would operate it.

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So if I actually pick this up.

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And here, why don't you
actually hang onto it.

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>> DAVID MALAN: Yeah, sure.

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Thank you.

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>> DAN COFFEY: And now you can
see how little the camera moves

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when you hit the edge, right,
the window if you will.

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It starts to pan with you.

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That's actually set in
the software as well.

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>> DAVID MALAN: I see.

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>> DAN COFFEY: But there's
another really neat feature.

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If you are in a more complicated
shoot, you can turn on this remote,

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have a second camera operator
actually do the nitty gritty controls.

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So I can now pan and flex this control.

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I can tilt and I can actually roll.

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>> And so in this set
up, you would actually

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be the one moving the camera physically
and I would connect a wireless video

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transmitter to the camera, put
a receiver here on a monitor.

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And then I could actually,
just like a video game,

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kind of operate the camera for you.

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>> DAVID MALAN: Nice.

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>> DAN COFFEY: So I'll put it
back in single operator mode

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so you can get a sense of
how smooth it actually is.

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>> DAVID MALAN: Yeah.

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No, absolutely.

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And I have an idea.

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Follow me?

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>> DAN COFFEY: Sure.

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DAVID MALAN: OK.

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So we're here in the bathroom to test
out some actual image stabilization

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in front of, well, the
only mirror we have.

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And I thought it'd be interesting to
see just how much the camera moves when

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I actually move my arms--
up, down, left, and right.

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DAN COFFEY: So let's see
there the handheld roll.

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Go for it.

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DAVID MALAN: All right, here we go.

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>> DAN COFFEY: Really moving it.

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DAVID MALAN: Yes.

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DAN COFFEY: So I see a little
bit of movement, but I mean,

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you would never operate
it like that either.

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>> DAVID MALAN: No, definitely not.

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>> [TOILET FLUSH]

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DAN COFFEY: All right, so David,
let's get serious this time.

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We'll do a test where you
actually go up the stairs.

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And I will lead you
with a stabilized MoVI.

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And Andrew will actually
come next to me.

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Come on over, Andrew.

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And we'll see what it
looks like side by side.

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>> ANDREW HILL: Got it.

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DAN COFFEY: OK.

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Here we go.

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We're going to go up the
stairs in three, two, one, go.

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Hi, Shelley.

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All right, David.

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Why don't you take this?

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Take all that you've learned
today and put it together,

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and we'll get the final shot.

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All right, and here we go.

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>> [DRAMATIC MUSIC PLAYING]

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