ITEM NAME:4X Achromatic Objective Lens for Biological Microscope 185 Objective Lens M L2N7 4X Achromatic Objective Lens for Biological Microscope 185 Objective Lens M L2N7 Aluminum Alloy shell is precision machined, stable and durable for long time use This is a 4X achromatic objective lens for biological microscope It can eliminate unwanted reflections and increase contrastOffers high quality observation without additional chromatic aberration, make image more clear Name:Achromatic Objective Lens Magnification: 4X Conjugate Distance: 185mm Suit Microscope: Biological Microscope Colour:Photo Color Material:metal Package Contents: 1*4X Achromatic Objective Lens.This is a 4X achromatic objective lens for biological microscope. 1 4X Achromatic Objective Lens. Suit Microscope: Biological Microscope. Magnification: 4X.