Let's take it right there.

And what we want to do is, we want to find out the coordinates of the focal points.

Requires great focus.

It's not just focused on the particular, it's focused on kind of the metalevel.

Let's focus on the conversations between our friends and our family and our coworkers and our loved ones.

And this is f2.

And it's for focus.

Set here equivalent focal length assuming a 35mm film camera, in mm. A value of 0 means the focal length is unknown.

And let's say I have some other point.

So what's the reality?

Well, the first thing you do is though I've never well, we could just figure out the focal length just by plugging into the formula.

The distance of this point to the image plane up uppercase Z.

(Laughter)

So, anyway, this is the really neat thing about conic sections, is they have these interesting properties in relation to these foci or in relation to these focus points.

And then we can try to figure out if we have a parabola, how do we figure out its focus and is directrix.

I'll call that well, we'll call that a focus because it will be a focus.

We have focused on the worst case scenario.

That's this distance right there.

This is f1, this is f2.

What is the evidence upon which this is based?

So, the focal points are going to sit along the semi major axis.

And you enter that space, and you feel like, Wow!

Though graphics hardware can definitely accelerate image processing operations. We'll mostly be focused on 3d rendering in this course.

The square root of that.

One financial trader, woman made of steel, bawling 30 friends crossing off that all died.

So there's one point that just by looking at it we could say is going to be in our locus.

And then I have this distance over here, so I'm taking any point on that ellipse, or this particular point, and I'm measuring the distance to each of these two foci.

So let's call that a directrix.

Focal length

Focal

Focal Length

Focal blur

Focal point

First Focus

Second Focus

Focal Length

Focal length

I want to focus on just one of them.

And you essentially divide 1 by 4 times this value.

Focal length of the lens

Well, we just used the distance formula.

Or they can be, I don't want to say always.

I focused the camera on her face.

But where's the focus point?

Her face is in focus.