SVBONY SV154 26mm 2" telescope eyepiece, with 70°ultra-wide-angle viewing experience, is particularly useful for locating and appreciating wide targets such as star clusters and nebulae. An excellent choice for both beginners and experienced astronomers observing the Moon, planets, and deep space. A 70°wide angle telescope eyepiece enhance the observing experience through its expanded field of view, improved comfort and excellent image quality.The wider field creates a more immersive experience, making it feel as though you are surrounded by the stars. The eyepiece housing is designed with a non-slip rubber grip ring, so that it will not fall easily when you hold it in your hand. SV135 fully multi-coated zoom plossl eyepiece zooms to any focal length between 7 mm and 21 mm - pick the better magnification for your subject. As a beginner; SV135 zoom eyepiece is good for starter astronomer! 7mm-21mm linear continuous zoom. Regarding the zoom action; it is stiff enough that you won't accidentally shift focal lengths; but it is also smooth enough that you can rotate it without holding the base of the eyepiece with your other hand. 6-Element 4-Group premium optical with FMC ultra high quality standard coating;It also ensures the transmission of light up to 97% while reducing the loss of light during transmission.