These are beauties. 5 elements in 3 groups. Coated optics. Clear lens diameter is 30mm. Barrel is 53mm diameter by 30mm long. Makes a nice color corrected magnifier without distortion. About 3X wide field power but will provide larger images depending on the magnifier distances from the text and your eye. if you get a bit creative adding a 2" telescope barrel, you can make a great 95mm 2" telescope eyepiece.
