SV211 handle bar is easy to carry when traveling and going out; no pressure to hold; suitable for short distance carrying protect the telescope; reduce collision and wear when taking the telescope somewhere SV211 handle fits SV198 or other guide mirrors and viewfinders; provides a guide scope and finder scope mounting platform; for easy installation of accessories Dovetail base work with finder scope or reflex sight bracket; include two large thumb screw locks; so you can securely attach an aiming device to any telescope SV165 mini guide scope 45mm back focus distance; Allows easy and precise focus adjustments and f4 aperture optics provides a very wide field of view which will help to quickly find the target when performing astronomical observations SV165 mini guide scope ltra wide band fully multilayer coated lens; double glass and the 30mm achromatic optics prevent irritating reflections can bring you bright and clear images