Light travels at different speeds based on the medium it passes through. For example, in a vacuum, it travels at 3.0 × 10^8 m/s in a straight line. But when directed towards glass, air, diamond, water ...

Modern camera lenses are complicated. Really complicated. I know, because I tried to fix the aperture control ring on my Canon 24-105 the other day. To cut a very long and confusing story short, I now ...

Figure 1. The two chromatic aberrations (in exaggerated form for visibility) for selected RGB wavelengths. Click here to see an enlarged diagram. In the last paper of this article series, optical ...