Mini-guide tube to quickly find objects and guiding stars, designed both for visual, as well as for photographic use.Take any 1.25 inch eyepieces in your collection, worm-focuser: fast focusing. Prevents rotation of the camera and eyepiece. Or use it as a comfortable, large viewfinder to waste less time finding objects in visual observation. | 240mm focal length. Compact mini guide scope designed for use with astrophotography telescopes up to 1500mm focal length. With bright, wide-field optics puts numerous potential guide stars in view so you'll never have to search for one! There is an extension tube locking thumbscrew to hold the extension tube in place, and the other two holes are equipped with built-in hexagonal screws, which you can also tighten the two hexagonal screws with an hex wrench to lock the extension tube if necessary. | Adjustable-aim dovany weight to an astrophotography setup and can conveniently be stashed in an accessory case between uses. "Dovetail guide scope bracket installs on virtually any astrophotography telescope quickly and easily. | The sturdy metal housing made ​​of black anodized aluminum. Looking out not only solid, but is also very robust. A milled and knurled ring allows easy and precise fine focus adjustments. It comes with matching pipe clamps and a Synta-style mounting plate to make assembly and installation as easy as possible. | Have a built-in worm-focuser with Brass Compression Ring and 2 thumbscrews,45mm 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. The mechanism has a determined orientation: This is mounted cameras or eyepieces - and thus also the area with your guide stars - not rotate during focusing.