The lens provides high power magnification to make it look closer and more detailed. The Moons earth surface, etc.T-adapter and Barlow lens full-color coated optical design for clearer image Fully coated higher eyepiece magnification planetary filter Jupiter Saturn exquisitely lifts Mars2 X Barlow lens housing is black to maximize image contrast The body is all black metal construction for long-term useHigh-magnification existing eyepieces to see more details of the moon and the band of Jupiter that clearly Barlow lenses are a must.It will help your existing 2x volume set eyepieces cost a single eyepiece for easy use just insert the eyepiece the Barlow lensThen insert the range of the Barlow lens.The Barlow lens can also provide more magnification without lowering your eyepiece exit hole for comfortable viewing at a wide angle1.25inch 2x Barlow lens fully multi coated metal with M42x0.75 thread camera connect interface for telescope eyepiecesColour: blackMaterial: metalSize: about 37.8mm x 37.8mm x 64mmPackage Contents:1 x 2X Barlow LensOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.