I wonder how 3D is the image here? The first and the last image of the circle becomes a compressed and stretched ellipse. But it is indeed a 3D object viewed from the side?

moridin22

Assuming the lens is circular, you will get the exact same magnification effect if you look at the image from any rotation about the main axis (the horizontal line in the picture) so this idea does indeed extend to three dimensions.

eric99ying

Does the circle here refers to the circle of confusion where blurring occurs?

muminovic

I believe the circle is just an arbitrary object used in the demo to show the effects of magnification

GitMerlin

I think the size of the circle of confusion depends on where the sensor plane is.
My guess is yes. @eric99ying

I wonder how 3D is the image here? The first and the last image of the circle becomes a compressed and stretched ellipse. But it is indeed a 3D object viewed from the side?

Assuming the lens is circular, you will get the exact same magnification effect if you look at the image from any rotation about the main axis (the horizontal line in the picture) so this idea does indeed extend to three dimensions.

Does the circle here refers to the circle of confusion where blurring occurs?

I believe the circle is just an arbitrary object used in the demo to show the effects of magnification

I think the size of the circle of confusion depends on where the sensor plane is. My guess is yes. @eric99ying