Item Type: Auxiliary Objective Lens_x000D_ Material: Aluminium Alloy + Optical Glass_x000D_ Magnification: 5X_x000D_ Number of Lenses: 1 Piece_x000D_ Lens Coating: Broadband Coating_x000D_ Sleeve Material: Aluminium Alloy_x000D_ Interface Size: 1.25inch (Approx. 31.7mm)_x000D_ Thread Size: M28.6x0.6mm(0.02in) Pitch (Industry Term: Fine Thread) 1High Definition: Magnification barlow lens adopts high definition 5x magnification, helps you see clearer and farther. 2Excellent Performance: The auxiliary objective lens features a broadband coated lens with excellent image contrast and light transmission. 3Premium Material: The microscope auxiliary objective lens is made of aluminium alloy and is robust, lightweight and durable. 4Applicable: Camera lens with thread, M28.6x0.6mm pitch. Suitable for 1.25in / 31.7 mm astronomical telescope eyepieces. 5Practical Accessory: Microscope camera lens can double total magnification power of your microscope and reduce the focus length. Nice accessory for astronomy lovers.Manual measurement please allow some errors.1 x_x000D_ _x000D_ MagnificationBarlowLens 1 x Storage Box