Ellipse by Focuses Point

Hyperbola by Focuses Point

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.

An ellipse constructed by its focuses and a point that pertains to it

That's this distance right there.

We have focused on the worst case scenario.

And hard to keep focus.

A hyperbola constructed by its focuses and a point that pertains to it

Conic by Directrix, Focus Point

So you know that a is equal to x1.

Focal length of the lens

Well, we just used the distance formula.

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

Just focus.

Bifocals.

Your 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.

Show camera aperture and focal length

And let's say I have some other point.

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

Focal Length

Telescope focal length

Eyepiece focal length

So let's call that a directrix.

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

Parabola by Directrix Focus

Same thing, that's this line.

Construct a conic with this point as focus

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

35mm equivalent focal length

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

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

Requires great focus.

We focus on Parker. And move it.

And it's a center, a focal point for economic and social development.