New posts in Lenses

Why are the edges of the shadow so bright?

How does a telescope make an image larger by shrinking it?

Can we see a point with only one ray or do we need two rays?

What is the theory behind imaging a precision pinhole?

Is there a more accurate form of the mirror equation $\frac{1}{f}=\frac{1}{u} + \frac{1}{v}$?

Why do convex lenses not disperse light like prisms, given that entry and exit points aren't parallel?

What is the "tangential" distortion of OpenCV actually tangential to?

Does 'focal length' mean something different with lenses and pinhole cameras?

Difference between convexo-concave and concavo-convex lenses?

If a lens focuses all incoming light to a point, how do we get 2D images?