AmScope 40x-1600x Binocular Compound Darkfield Microscope Darkfield and Brightfield Microscopy - Eight Power Settings 40X-1600X High Quality Optical Lenses and Abbe Condenser with Iris Diaphragm Sturdy Metal Framework and Double Layer Mechanical Stage Tension Adjustable Coaxial Coarse Fine Focus Dry Darkfield Condenser and Brightfield Condenser Included