The pictures provided on their store and their description show the lens as 127mm and all pictures show the lens as being that size. I ordered the 20x magnification and the unit actually has 2 lenses . The upper one is actually 105mm AND THERE IS A SECOND LENSE AT THE BOTTOM with a diameter of 80mm which doesn't show in ANY of the pictures on their store so they mislead you into thinking that the lens will be 127 mm when in fact it isn't. This GREATLY reduces the field of vision. WHat's more the lower lens has another tiny lens glued to it to make matters worse
Shipping speed and great product and the seller has very high morals (I recommend dealing with him)