CARSON OPTICAL LT-30 LINENTEST? MAGNIFIER – LT-30 THE LT-30 LINENTEST? MAGNIFIER FROM CARSON OPTICAL IS A COMPACT, FOLD-OUT LINENTEST MAGNIFIER FEATURING A 5X POWER 30MM LENS. THE LT-30 CONTAINS MARKINGS IN BOTH INCHES AND CENTIMETERS FOR EASY MEASURING OF SMALL PARTS. THE LINENTEST? IS PERFECT FOR STITCH COUNTING. THIS MAGNIFIER IS PORTABLE, LIGHTWEIGHT AND FOLDS FLAT FOR STORING WHEN NOT IN USE.