The first step in making
your selection is to decide exactly how you want to use your magnifying glass.
Will it be used to read a newspaper or a book, read the fine print on a map, or
a finely printed prescription label? Do you want to read a menu in a restaurant,
examine a diamond or gemstone? There is a wide range of different types of
magnifiers in addition to the popular lollipop or Sherlock Holmes shapes, such
as Head Visor magnifiers and the pendant necklace magnifying glass. You can
choose pocket or purse folding magnifiers, an eye loupe, and tabletop
magnifiers and round the neck hands-free magnifiers. You can find lighted
magnifying glasses including LED lighted jewelers’ loupes, lighted pocket
magnifiers and lighted handheld magnifying glasses. You can find the type of
magnifying glass to meet your specific requirements.
What Does Focal length,
Field of View and Depth of Field Mean?
Magnifying Power is the ability of the lens
to increase the visual size of an object. The X (times) is used to identify
this factor. A magnifying lens bends light rays resulting in an image that
looks larger than the actual object. For example, a 3X magnifier triples the
size of an image, 4x magnifies 4 times, 5x five times and so on; Focal Length
or Working Distance. In addition to power, a magnifying glass can also be
classified by its working distance. The higher the power of a lens, the shorter
is the working distance (the distance between the object and the magnifier).
For example, a 2X lens has a working distance of 5". Field of View is the
size of the area that you see through the magnifying glass. The field of view
becomes smaller as the magnifying power increases.
The depth of Field is the distance in which
a magnifier can be moved above an object and still have the object in focus.
The higher the magnification, the shorter is the depth of field. Choosing where
to buy your magnifying glass online is just as important as selecting
the magnifying glass. Here are some suggestions on how to find the right place
to make your selection. You want to make your purchase from a company that
offers you an unconditional guarantee.
For example, if you order your magnifying
glass online and then discover that it's just not the magnifying glass you
need, you should be able to return your purchase for another selection or
return it for a full refund. You may not find a retail store that has what you
want and you may have to place your order on the internet. That's why it is
most important to find a seller who unconditionally guarantees your
satisfaction.
Will One Size of
Magnifier Meet All Your Needs?
Probably not, but one very popular solution
gives you A choice of several handheld magnifying glasses sold together in
sets. These provide multiple magnifying powers and varied diameter lenses that
can be used as needed for different purposes.
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