185 Achromatic Objective for Biological Microscope - 4X, 10X, 40X, 100X Magnification Options 1pc

Magnification: 4x Lens Length: 29mm; Number Aperture: 0.1mm; Working Distance: 17.3mm; Thickness of Cover Glass: 0.18mm; No Spring, No Submersion. (See insects, bills, repair electronic motherboards, etc.(can only see objects) clearer images of a magnifying glass. Product name: 185 lenses for achromatic objectives for biological microscope 10 x Lens length: 31 mm; Number aperture: 0.26 mm; Working distance: 2.03 mm; Thickness of the glass cover: 0.18 mm; No spring, no immersion. (See mites, dust, search image, preliminary amplification) 40 x Lens length: 38 mm, Number aperture: 0.25 mm, working distance: 0.55 mm, thickness of the glass cover: 0.18 mm, with spring, no dipping medium. (Watch cells, blood, semen, eggs, artificial insemination, etc.) 100 x Lens length: 38 mm; Number aperture: 1.25 mm; Working distance: 0.18 mm; Thickness of the cover glass: 0.18 mm; Spring, immersion medium: oil (test, blood test, bacteria, scientific research, students see samples, etc.)