It features achromatic color-correction, and plan field-correction.10 Thread: RMS Tube Length: infinity-corrected Cover Glass Thickness:0 Color Correction: achromatic Field Correction: plan 4X Plan Achromatic Objective Lens for Infinity-Corrected Metallurgical Microscopes. Features & Specifications: Magnification: 4X NA: 0.Primarily for metallurgical microscopy, the lens is designed to be used without cover slips.
Packing List :Four High Quality DIN Objectives, 4X, 10X, 40X & 100XOne Pair of 10X Widefield EyepiecesOne Pair of 20X Widefield EyepiecesOne Blue FilterDust CoverImmersion OilUser's Manual DownloadOne 5MP USB 2 Microscope Digital Camera with Reduction LensTwo Mounting AdaptersOne USB CableOne CD with Software, Driver & User's InstructionsShipping Weight: 18 lbs For Mac & Linux, there is a lite version with limited processing features..