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More Detail is Our Passion. Magnifying Terminology 1. Lens Magnification 2. Lens size 3. Focal distance Lens Magnification and The Lens Size The higher the magnification of a magnifying instrument, the smaller the magnifying lens diameter. The lower the magnification of a magnifying instrument the larger the magnifying lens diameter. Magnification ratings of 2-3X power lens provide larger viewing areas and these are perfect for activities like enlarging the text in a book or newspaper. To reveal the details of a gemstone, stamp, or other items with extremely fine detail, smaller diameter lens are used. These small diameter lens instruments are usually called loupes. Loupes typically provide magnifications that range from 10-60X. Focal Distance Instruments with a smaller lens diameter typically have higher magnification while having a shorter focal distance. The focal distance of a magnifying lens is the distance between the lens and the object being viewed.Instruments with shorter focal distances like loupe's must be held close to the object being viewed. For these magnifier types they are usually held no more than an inch away from the object being examined. More Information The magnification of a magnifying glass depends upon where it is placed between the user's eye and the object being viewed, and the total distance between them. The magnifying power is equivalent to angular magnification (this should not be confused with optical power, which is a different...
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