Features Infinite Lens: The infinite objective is a parallel optical way without included angle, and can correct for spherical and sunken errors. The resulting image is clearer and sharper, with a wider field of view than ordinary achromatic lenses. RMS Interface: Comes with standard 20.2mm RMS interface, the objective lens is highly compatible with most professional biological microscopes. Exquisite Crafting: The entire set is designed with exquisite craftsmanship. This objective lens has been coated and has a high transmittance and refractive index, making the image brighter and clearer than other objectives. Good Material: Adopting premium brass and stainless steel materials, the infinite objective lens is very durable with corrosion and falling. Wide Field of View: More comfortable to watch, the lenses will not be injured or bloom, and the service life is long. Specification:Item Type: Infinite Objective Lens Material: Brass, stainless steel Use: Widely used, the threaded interface size is standard RMS size, and can be used on most professional biological microscopes.  Specification: 100X Package List:1 x Infinite Objective Lens 1 x Storage Tube Package List 1 x Infinite Objective Lens 1 x Storage Tube