With removable 2 inch adapter both fit for standard 1.25 inch diameter and 2 inch diameter; red laser collimation beam with 7 brightness levels; wavelength 635-655 nm; output power less than 5mw; can swiftly and precisely collimate Newtonian telescope
Built with metal material; CR2032 Lithium Cell battery Not include; accurate collimation in a few minutes provide a more clearer image; the telescope can be collimated by just one person
Laser unit has a front opening from which the laser beam can be emitted; a side window allow a disk oriented at 45° with a central hole to be viewed for optimal adjustment; then later be used to see whether the laser is reflected back on itself
Bahtinov masks take the guesswork out of focusing and even get over the seeing conditions as it is a mathematical type approach to the task; the best focus for your telescope quickly and easily
Suitable for use on all types of telescope; they are made from precision laser cut enforced plexiglass that is stiff and long lasting; they will never be brittle in the cold; unlike some other masks which are made from normal plastics