400mm focal length; with bright; wide field optics puts numerous potential guide stars in view so you'll never have to search for one; mini guide tube to quickly find objects and guiding stars; designed both for visual; as well as for photographic use
Have a built-in worm-focuser with brass compression ring and 2 thumbscrews; 90mm focusing range "10mm focusing range with micro-focusing helical focuser; the rest is by a fixable; scaled drawtube" is made possible by an extremely precise focus adjustment
Premium Optical Device: Aluminum alloy material is used to make it last longer; perfect for broad-field lunar observations; medium-sized star clusters and a wide range of cloudy nebulae; obtaining better observation results during astronomical journey
Allows you to attach any standard finder scope; Laser Pointer bracket or reflex sight bracket to Schmidt-Cassegrain telescopes "SCT" up to 11 inch aperture; great for second or third aiming device to your Schmidt-Cassegrain for multiple aiming options
Drilled "but not threaded" to accommodate screws up to 4mm in diameter; center to center screw hole spacing on your telescope must be from 21 to 37.3mm in order for this dovetail base to be compatible