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

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

We also know that the projection of the building on the internal chip is 4mm in size.

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.

And let's say I have some other point.

Let's take it right there.

Show camera aperture and focal length

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

And now we should be able to use this information to figure out the actual coordinates of the focus and the directrix of what I would call the classic parabola, y is equal to x squared.

Ellipse by Focuses Point

So 1 over 4 times 2 is equal to 1 8.

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

It's equidistant from a focus and a directrix, where this is the focus.

This doesn't cause any damage.

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

Hyperbola by Focuses Point

So what's the reality?

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

So let's call that a directrix.

Focal length

Focal

Focal Length

Focal blur

Focal point

First Focus

Second Focus

Focal Length

Focal length

It's not a this is wonderful!

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.

That's this distance right there.

So if we call this distance let's call this the d sub 2 the distance to the directrix.

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

We have focused on the worst case scenario.

And you essentially divide 1 by 4 times this value.

It looks something like that.

Show the camera aperture and focal length at the bottom of the screen.

Conic by Directrix, Focus Point

So you know that a is equal to x1.

And let's say that point let's put it right here is it the coordinate, let's call it a comma b.

Focal length of the lens

Well, we just used the distance formula.

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