This versatile 50mm aperture guide scope with a built-in helical focuser for precise focusing of potential guide stars.Designed for use with the guider CCD astronomy camera or eyepiece. It is an ideal accessories to any astrophotographers. Extinction design of telescope. Taper matt tooth and spray matting paint design can greatly reduce the light loss of light in the entire lens barrel, making the image clearer and sharper; Unique design with double protection to avoid loss of light, making the images you observe clearer and sharper. Lightweight and portable. 604g and 240mm total length that is very small and compact autoguiding system adds hardly any weight to an astrophotography setup. SV212 a telescope bag to pack your observation equipment and start your outdoor travel observation! Worried about the rough ground outdoors and splashing water damage the telescope? SV212 mirror bag is made of 1680 D polyester fabric with PVC coating, which is wear-resistant and waterproof, solving your worries. Want to fit accessories of various sizes into your telescope bag? 4 removable internal padded dividers allow your accessories to have their own "cubby" for less friction and more safety. The SV212 telescope bag is transported in a large carton to avoid the backlog and deformation of the telescope bag during transportation. Not only is there a padded protection underneath and beside it, but there is also a padding on the top, which protects the telescope 360 degrees. Shoulder pain from carrying heavy telescope bag for a long time, SV212 design shoulder pad to solve this problem, the padded straps can buffer the pressure of telescope bag, making it more convenient and comfortable to use.