Material: MetalFocal Length: 183mmInterface: 31.7/1.25inObjective lens: 50mmCoating: Fully multi-coatedItem length: 235mm / 9.3inItem Weight: 580g / 1.28lbPackage Weight: 800g / 1.76lbPackage Size: 280 * 140 * 140mm / 11.0 * 5.5 * 5.5inComes with a bracket that fits all kinds of telescope, easy to install.Nice accessory for astronomy lovers.Removable dovetail bracket.For use with astrophotography telescopes.Compatible with popular CCD guide star.As we all know, diffet computers display diffet colors,The color of the actual product may be slightly diffet from the picture below.