The Marcati 348 is an advanced manual lensometer with a built-in prism compensator. It reads lens power digitally and automatically in steps of 0.01D, 0.06D, 0.12D, and 0.25D. Therefore, human error is eliminated in the process to determinate a lens power. This advanced lensometer is made of top grade materials and finished under strict quality control. It is comfortable and easy to use. The illuminated internal drone and eyepiece dividing plate consists of one set two parallel green lines which is intersected by another set of three parallel green lines, as shown in the picture. This state-of-the-art modern target can be rotated to match the axis of any measured lens (or pre-set the axis of the target, and rotate a lens to match the required axis). A built-in lens marking device can accurately mark a lens with both center and axis. Do not miss this opportunity to possess this best machine on the market.