SVBONY 2X Barlow Lens Bundle with SV135 Telescope Eyepiece Zoom 7 to 21mm 1.25 Inch Zoom Eyepiece, Telescope Accessory for Astronomic Telescopes

• SV135 7 mm to 21mm adjustable focal length.SV135 7-21mm zoom eyepiece equivalent to multiple eyepieces .obtain higher magnification with short focal length.It could bring you a better observation experience in a comfortable situation with high-contrast imaging SVBONY 2x Barlow Lens increases the magnification of your 1.25” eyepieces by 2x.The premium 2 element one group apochromatic optics are fully multi-coated for optimum light transmission and yield high contrast.true color images Fully multi-coated Premium eyepiece.The true fully multi-coated Premium eyepiece with superior edge and center sharpness than normal PLOSSL eyepieces. 6-Element 4-Group premium optical design for superior optical performance 2 element one group broadband green film multi coated optical glass.the housing is blackened to maximize image contrast.both that gets high quality observation without additional chromatic aberration.make image more crisp and sharp Standard 1.25" eyepiece.Equipped with a precision-made standard 1.25-inch lens barrel that is compatible with any telescope that accepts 1.25-inch eyepieces. Rubber eye guard for comfortable viewing and blocking stray light