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Art Deco Rowenta enamel rhinestone compact Vintage art deco style compact, c. 1960s, made by Stratton of Birmingham A modified compact containing coding on the mirror, designed to be used by CIA operatives – date of production unknown source: CIA. A compact (also powder box, powder case and flapjack) is a cosmetic product.
Loupe-mounted lights used to be fed by fiber optic cables that connected to either a wall-mounted or table-top light source. Newer models feature a more convenient LED lamp within the loupe-mounted light and an electric cord coming from either the conventional wall-mounted or table-top light source or a belt clip rechargeable battery pack.
In some eyepiece types, such as Ramsden eyepieces (described in more detail below), the eyepiece behaves as a magnifier, and its focal plane is located outside of the eyepiece in front of the field lens. This plane is therefore accessible as a location for a graticule or micrometer crosswires.
A telescope, which uses its large objective lens or primary mirror to create an image of a distant object and then allows the user to examine the image closely with a smaller eyepiece lens, thus making the object look larger. A microscope, which makes a small object appear as a much larger image at a comfortable distance for viewing. A ...
Magnifying glasses typically have low magnifying power: 2×–6×, with the lower-power types being much more common. At higher magnifications, the image quality of a simple magnifying glass becomes poor due to optical aberrations, particularly spherical aberration. When more magnification or a better image is required, other types of hand ...
Live Results: Massachusetts Senate Special Election. Posted: 6/25/2013 11:50 am EDT | Updated: 6/26/2013 12:00 am EDT