The Carson MagniScope is an unusual and useful magnifying instrument. Two components combine to create three different optical devices - an 8x20mm monocular, 3x stand magnifier, and when threaded together, a precision 30x portable microscope.
3x stand loupe & 8x monocular are combined to produce a 30x portable microscope
20mm Objective lens diameter
8x Monocular provides a Field of View of 288 feet at 1000 yards and a minimum focusdistance of 6'