Works perfectly, good quality, fast delivery. Now my SCT is perfectly collimated every time I take it out which takes about 10 minutes.
The Hubble Optics Hubble 5-Star Artificial Star may served its intended purpose fo night use, but it did not that well for me at daytime inside the house. Collimation when smoothly with the bigger diameter star when I used my C-8 at 400x, but when I switched to the smaller diameter the star was too dim. It may work better at night, but I need the collimation done at daytime before I star my night session. Bought the AstroZap, the star is smaller and brighter.
It produced the artificial star image I needed to collimate a refractor but it uses batteries too fast and illuminates all 5 star openings even if you just need one. It would be much nicer if the LED corresponding to the star you want could be selected and the rest turned off. Also would be nice if an external power supply could be added so I dont go bankrupt buying aaa cells.
Over all the items works and allowed me to touch up the collmination of my SCT's secondary mirror. However I find the little magnet mask supplied with it is hard to get to stick to the surface to cover the unwanted stars. You have to mess with it to get it to stay on.
It works, but I don’t know for how long. Made from VERY cheap materials. At least build it in a metal flashlight frame. Metal LED flashlights this size are a dime a dozen. You are basically paying for the laser-drilled plate of holes.