This magnifier is a simple microscopic magnifier with magnification factor of 30x. It is obvious that a magnifier with magnification factor greater than 20x can be produced most simply using a combination of lens with ocular positioned at a certain distance as with a stand microscope. However a longer tube is essential for a compound microscope, so that it cannot be used with one hand. Moreover the image is reversed. This gave rise to the demand for a magnifier, which could be held in one hand, capable of producing true images, whereby the optical performance was then secondary. This magnifier is a product that fulfils all requirements in the area of photomechanics and precision brands. The magnifier is so small and light, that it can easily be used with one hand, while holding the object to be inspected in the other. Thanks to its excellent optical quality, its capabilities are comparable to a stand microscope with the same magnification factor, whereby the resulting image is not reversed. This magnifier consists of four lenses in two groups. It is laid out so that the field of view is greatest when the pupil of the observing eye is located along the optical axis 8mm away from the crown of the lens. For this reason the user should press the magnifier lightly against his face with one hand, while holding the object to be inspected with the other. The distance to the magnifier can be varied for focussing. The minimum depth of field resulting from the high magnification factor of the magnifier makes it recommendable for the user to practice precise focussing. It is also necessary to hold the magnifier so that the optical axis coincides with the eye's axis of vision. These lenses are coated to prevent reflection.
Magnification factor 30 x
Field of view 7 mm
Optical characteristics Achromatic, distortion-free
Dimensions 36 x 20 mm
Weight 10 grams