Will magnifier work when touching a page?

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E-Tay Will magnifier work when touching a page? Introduction

E-TAY INDUSTRIAL CO., LTD. is Taiwan supplier and manufacturer in Optical Industry. E-Tay has been offering our customers high quality Magnifying Glass, Magnifying Sheet, Headband Magnifier, Lighted Magnifier, Page Magnifier since 1980. With both advanced technology and 38 years experience, E-Tay always make sure to meet each customer's demand.

Will magnifier work when touching a page?

Usually. It won't get the magnification effort when touching a page.
Because a magnifier with convex lens needs some distance between object and lens as focal length.
In order to achieve maximum magnification without distortion, the user should position the lens a proper distance from the object.
The distance from the 3x magnifier to the object viewed is about 8-10 cm. This distance offers user better viewing experience.

THE FOCAL LENGTH (Working Distance)

is the ideal distance between the lens and the object, not too close (or the lens won't magnify) and not too far (or the image appears wavy). And if you hold the lens MUCH too far from the object, the image will appear upside down.

NORMAL WORKING DISTANCE FOR A LENS IS 10 INCHES

This is rather neat because (as you will see if you read the extra-technical stuff below) 10 inches is about 25cm, and 25cm X4 = 1 meter (near enough), and physicists use 1 meter as the definition of 'standard' focal length (not very practicable as a 'working distance')...but don't worry about that, all you need to know is -

THE WAY I CALCULATE MAGNIFICATION NOW FALLS IN LINE WITH THE 'OFFICIAL' METHOD YOU FIND ONLINE, LIKE THIS:

1 inch = 10X magnification
2 inch = 5X magnification
2½ inch = 4X magnification
3 inch = 3.4X magnification
3½ inch = 2.8X magnification
4 inch = 2.5X magnification
5 inch = 2X magnification
6 inch = 1.7X magnification
7 inch = 1.5X magnification
8 inch = 1.3X magnification
9 inch = 1.1X magnification

Magnifying glasses can be mounted on stands to form microscopes, which scientists like chemists and biologists use to perform research. Microscopes are also used in medical research, and in medical labs for testing blood and other bodily fluids and tissues. Microscopes can magnify objects thousands of times, making it possible to see organisms and elements of different types of matter that cannot be seen by the naked eye. Some microscopes are fitted with cameras that record these magnified images.

HOW DOES A DOME MAGNIFIER WORK WHEN TOUCHING A PAGE?

Dome Magnifiers are also known as a hemispherical magnifier, and a light gathering magnifier.  Dome Magnifiers are uniquely shaped in a half circle they are constructed from pressure formed solid optical acrylic rod, which is then expertly shaped and polished. This design provides distortion-free pre focused 3.5x-4x magnifying power, depending on the diopter on the top As with any lens there is an inverse relationship between lens size and power. The unique design of the Dome Magnifiers allows them to glides easily across a smooth reading surface and makes reading small print effortless with the 3.5x-4x magnification.Dome Magnifiers are pre-focused you simply place the magnifier directly on the item to be viewed. Dome magnifiers are an ideal reading aid for the visually challenged, and is one of the best optical tools for those with macular degeneration. The 3.5 and larger Dome Magnifiers are large enough enlarge a full column of a newspapers into one field of view.