Large Field of Cells for Adults BAK4 prism and FMC lens for bird watching hiking camping 10-30x42 zoom zoom monocular telescope Good- power monocular telescope with smartphone clip and tripod16mm large eyepiece &42mm large objective lens The10-30x42 zoom monocular telescope is equipped with a larger eyepiece and objective lens than a normal monocular telescope, guaranteeing more light transmittance and a brighter and larger field of view.Suitable for adults and children, this 10-30x42 zoom monocular telescope is a good partner for mountaineering, hiking, driving, racing, tourism, animal watching, bird watchingUsing a tripod and a smartphone together can make the imaging more stable and the viewing distance longer. At the same time, the monocular telescope of the smartphone can take pictures and provide Good-definition pictures to share with friends.