The 2x Barlow Lens simply increases the magnification of the eyepiece without significantly reducing optical quality; you can still use eyepieces with longer focal lengths for better pupil dilation and the image; Premium fully variegated Telescope Barlow lenses in a four lens design are used for high-end quality planetary photos to ensure excellent correction and pin-sharp; high-contrast images without chromatic aberration; The housing is machined from aluminium alloy with a high grip rubber armouring in the middle section which is not easy to fall off when in use; high-quality craftsmanship ensures the longevity of the lens and an excellent use experience; The barlow consists of a body and a adapter ring that allows the mounting of both 2 inch and 1.25 inch eyepieces. The eyepieces or cameras are connected through the compression ring to provide optimum protection against possible damage; The product is designed with a 2 inch female thread for use with 2 inch telescope accessories such as 2 inch filters; and the internal matte female thread reduces light scattering to provide a better astronomical observing experience.