Multi-Function: Designed for Reflector telescope; fit for standard 1.25 inch diameter; this sturdy laser unit allows to swiftly and precisely collimate Newtonian telescope; accurate collimation in a few minutes provide more clearer image
Premium metal construction and anodizing aluminium processfor long time use; require one CR2032 lithium battery not Included
Practical Design: Red laser collimation beam with 7 brightness levels; wavelength 635-655 nm; output power: less than 5mw; much safer for your eyes; only when the optics have been accurately collimated can the telescope offer you its full performance
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
The masks grip the telescope tube gently but firmly with three metal posts which have non-scratching silicon sleeves to protect valued telescope surface; mask remains centered since 3-post mounting; while fitting a wider range of telescopes