Levenhuk's 7.5-22.5mm Zoom Eyepiece you can quickly and easily go from a low magnification to high power with a simple twist instead of taking valuable observation time to change eyepieces and filters. At the low magnification setting of 22.5mm its wide 66° field of view allows you to easily find your subjects or enjoy expansive views, and when dialed up to the high setting of 7.5mm the angle of view is still an impressive 42 degrees. Anti-reflection fully multi-coated optics ensure bright and clear high-contrast images at any magnification, with true color rendition. The eyepiece is designed to fit any 1.25" diameter drawtube or accessory, and its slip-resistant textured collar ensures safe handling - especially in the cold or when wearing gloves - and allows for precise focal length selection. Finally, a twist-up eyecup makes for comfortable viewing with or without eyewear.