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
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
7pcs filters set include most popular color planetary and moon telescope eyepiece filters;moon filter;CPL filter;5 color filters with 23A bright red;21 orange;12 yellow;56 bright green;82A bright blue
5 color filters are an essential tool of the lunar and planetary;with red;green;blue;orange and yellow highlight features on Mars;Jupiter;and Saturn
Moon and skyglow filter;Cuts down glare and brings out much more surface detail and gives you better contrast; It is a multi-band pass filter transmitting a high percentage of light in the visual spectrum; Effectively filters out selective wavelengths of low-pressure sodium and other man-made sources typically used in street lighting