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 3.8mW; Complies with Class 3R laser safety standards; can swiftly and precisely collimate Newtonian telescope
Precision aluminium housing has front opening which laser beam can be emitted for optimal adjustment; side window allow 45 degree disk with central hole to be viewed; used to see whether laser is reflected back on itself; indicate well collimated optics
The laser comes fully adjusted however further adjust if required; it has three openings for adjustment; arranged at 120°; which are initially sealed; small screw cap at the rear of the laser must be first unscrewed to allow this
100 Percent Brand New and High Quality: Multi-coated 2 inch 80 degree F30mm UWA telescope eyepiece; the Ultra-Wide 80 Degree Eyepieces are equipped with plastic case; which can better protect eyepieces and against dust than the cap
Barrel Size: 2 inch this superb ultra wide angle eyepiece has 80 degree field of view