#coddington_magnifier
Coddington magnifier
A Coddington magnifier is a magnifying glass consisting of a single very thick lens with a central deep groove diaphragm at the equator, thus limiting the rays to those close to the axis, which minimizes spherical aberration. This allows for greater magnification than a conventional magnifying glass, typically 10× up to 20×. Most single lens magnifiers are limited to 5× or so before significant distortion occurs. The drawback is that the diaphragm groove reduces the area seen through the magnifier.
Sun 24th
Provided by Wikipedia
This keyword could refer to multiple things. Here are some suggestions:
0 searches
This keyword has never been searched before
This keyword has never been searched for with any other keyword.