| Author | Message | ||
     M_currie Tinkerer Username: M_currie Post Number: 174 Registered: 07-2006 Rating: N/A |
Some of the innards of lenses are very interesting. For example, I once took apart a zoom lens, and the center group, which moved inside the assembly, still in one piece, has an interesting property. I am very far-sighted, and usually need magnification to see close objects. But this group, although in one direction it has negative magnification and in the other essentially zero, eliminates the blur in both directions. Very strange. |