The GEO double hand lens is an excellent magnifier for those requiring a standard magnification with a wide viewing area and a more powerful magnification when needed, though more concise. This model features two lenses on either side of the lens, the first is a x 10 magnification optic with an 18 mm diameter viewing field, the second is a more intense x 20 magnifier but with a smaller 12 mm viewing field, this small diameter allows the magnification to be strong with distorting the vision. Both glass pieces and the body are housed in chrome plated stainless steel, with two sets of magnifiers, this is a very versatile lens, it can be used to observe rock samples, fossils, minerals plant matter however, the x 20 lens can allow you to view all these in much higher detail but also view sediments, insects and other very small objects. It is also important to note, that neither of these lenses are triplet or five elements as confirmed to us by the manufacturer. They are standard single glass optics, if you see the same model being sold claiming otherwise, you should be aware that the information is false.