PEAK Full Focus Scale Loupe. 360 degree clear acrylic base admits light from all directions. Smooth helicoid twist focus mechanism comparable to those used on high quality camera lenses. Removable glass reticles with black scales. Reticle with white markings . Fully coated for color corrected flat field viewing. Comes complete with measuring reticle, protective carrying case and lens cleaning cloth. High precision optical quality achromatic lens system with focusing from +2 to -2 diopters gives you a needle-sharp, brilliant image from edge to edge. 10X magnification. 0.8" lens diameter. 1.1" field of view. 4 lens optical system. 0.005" scale division. 35mm scale diameter. 0.8" measuring range. Measures 1-23/32" diameter by 1-51/64" height.