1.Compatible with mainstream auto-guiding cameras; 1.25in and M42 mount interface designed for compatible with SV305 Pro and for Orion ZWO QHY and so on auto-guiding cameras(Some camera models require additional accessories to assist in focusing)2.Sharp image; Ultra-wideband fully multilayer-coated lens; doublet glass and the 30mm achromatic optics prevent irritating reflections can bring you bright and clear images3.45mm 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 observations4.Nylon-tipped thumbscrews; Comes with the mounting rings with plastic-tipped screws as not to scratch the scope tube and it can be moved to any position5.Quality craftsmanship; By using high-level CNC metal processing technology; the SV165 guide scope has an exquisite appearance; delicate feel and beautiful shape; fine workmanship bringing you visual enjoymentBrand: AngeleyesLens Diameter: 30 mmFocal Length: 120 mmCoated: FMCSupport interface: 1.25in Or M42*0.75 mount CameraFocuser Type: Front Part FocuserBack Focus: AdjustableDovetail includes 1/4 inch screw holeTube Travel: 45 mmSurface technology: Sandblasting oxidationMaterial:Metalcolour:blackPackage Contents: 1 x Guide Scope1 x BracketOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.