Black Friday AmScope Deals & Sales November 2025

This is a 100X dark-field objective lens for biological DIN-standard microscopes. Standard bright-field objective lenses present low contrast due to their high numerical apertures. This lens' built-in iris provides control over the aperture, varying between 0.31 and 1.25. This allows for the intensity of the dark-field contrast to be easily adjusted. Compatibility Optical System Finite Mechanical Tube Length 160mm Mounting Thread RMS 20.32mm Parfocal Distance 45mm Lens Specifications Magnification 100X Numerical Aperture 0.31 to 1.25 Corrections Plan-achromatic Cover-glass Thickness 0.17mm Nosecone Spring Immersion Medium Oil

This is a 4X achromatic objective lens for DIN-standard microscopes. Intended primarily for biological applications, it is designed to work with microscopes using 160mm tube-length and 45mm parfocal distance. Achromatic correction provides improved color accuracy and resolution. Compatibility Optical System Finite Mechanical Tube Length 160mm Mounting Thread RMS 20.32mm Parfocal Distance 45mm Lens Specifications Magnification 4X Numerical Aperture 0.10 Corrections Achromatic Cover-glass Thickness 0.17mm Nosecone Fixed Immersion Medium None Working Distance 19.46mm