SPI Supplies^® Brand Dome Magnifiers

Introduction:

These dome magnifiers, often times called magnifying domes, or even "hemispherical magnifiers" look like paper weights, they are heavy like a paper weight, but their real use is that of a distortion-free magnifier. The base has been specially treated to keep any friction to a minimum when moving across the flat surface of the object being examined. We believe one could say that the magnifier literally "glides" over the flat surface being examined.

Special features:

The SPI Dome Magnifiers, provide a distortion-free magnified image and the geometry results in the maximum amount of light reaching the surface under examination. Because of this feature, a special external light source is usually not needed. Lens are all special optical grade acrylic, hand crafted and polished, and exhibit virtually no distortion at the outer circumference.

Visually challenged:

The magnifying domes are used by the visually impaired, especially for reading newspapers, magazines, etc. We recommend the 95 mm dome 4x magnification for this application since an entire newspaper column can be covered in the field of view, and one can read down an entire column without having to engage in a horizontal scanning kind of motion. Alternatively, some might find the family of SPI Supplies Brand^® Magnifying Rulers to be more convenient for reading down the columns of a newspaper.

Comments about quality:

Don't be fooled into thinking that these dome magnifiers are anything less than a fine piece of optics. Because of the high optical quality of the plastic used, and the methods of construction, the distortion at the edges is kept to a remarkable minimum.

The SPI Dome Magnifiers come in four different diameters and each is accompanied with its own velvet storage pouch (and which doubles also as a cleaning medium, especially to remove fingerprints) to ensure a long useful lifetime. Diopter values are given for each magnifier. Note: For those not familiar with this term, diaopter is a unit of refractive power, equal to the reciprocal of the focal length (in meters) of a given lens.

SPI Dome Magnifiers

Description	SPI#	Each		In Stock
95 mm (3.74")diameter, 4X magnification, diaopter: 10D	B6908-AB *	$50.00		Yes
80 mm (3.15")diameter, 4X magnification, diaopter: 12D	B6911-AB *	22.50		Yes
65 mm (2.56")diameter, 4X magnification, diaopter: 12D	B6912-AB *	17.25		Yes

* While Supplies last!