We have focused on the worst case scenario.

That's this distance right there.

Let's take it right there.

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

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

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

Construct a conic with this point as focus

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.

There is no great central organization that pushes this people just pick up an idea and they run with it, and they implement it where they are.

Focal length

Focal

Focal Length

Focal blur

Focal point

First Focus

Second Focus

Focal Length

Focal length

And this is f2.

And it's for focus.

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

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.

Her face is in focus.

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

I want to focus on just one of them.

Select the focus of the new parabola...

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

This is f1, this is f2.

That's our directrix and it has the equation y is equal to k.

I need just a few talking points.

We focus on Parker. And move it.

Show camera aperture and focal length

Construct an ellipse with this focus

The scaling factor was 1.

Select the focus of the new conic...

Ellipse by Focuses Point

The square root of that.

This is always going to be the same as this.

Now what do those differences look like?

35mm equivalent focal length

And that's what we set out to figure out in the beginning.