Très bien

Seems well built finding a laser pointer to fit can be a problem you need something like a aaa battery size. It also comes woth a ring that screws on to be always on

Years ago when you could still find them on Amazon I bought the highest powered green laser pointer I could find. With new Ultimate Lithium batteries this laser will pop a black balloon. Ok, it takes a while but it'll do it. If you hold both the laser and the balloon rock-solid steady for about 3 minutes. Anyway ...I ran across this mount and decided the laser would fit it. It works fantastically. Make sure the finder scope cross hairs are correctly zeroed, adjust the laser to point to the intersection of the cross hairs and Bingo! You can now use the laser to get in the vicinity of what you want to see and do your fine adjustment with the finder scope.This has been so much handier than you would probably think, often with a high powered finder scope you aren't really sure that the thing you're zeroed in on is actually the thing you want to observe. You look through the main tube and find out that it is or it isn't. Now I can get close enough that there's no doubt when I look through the finder, you can actually see the laser beam in the finder.I love this because I have an Orion 10 inch Dobsonian Intelliscope. You have to precisely target two known stars to orient the Intelliscope feature. It doesn't really care which stars, so I use Polaris and Mizar (the middle star in the "handle" of the Big Dipper) because those are very easy to find and always visible at night where I live. Using the laser cuts down my orienting time to almost nothing so I can get on with my observations.This would all work exactly the same way with a powered "Go To" mount, you have to orient those in exactly the same manner only with some you have to use 3 stars instead of 2 stars.Not to mention that the great big tube of the Orion sitting there spitting a green laser beam at the sky looks very cool too. I didn't do this for the "cool" factor, that's a bonus.I also have a Telrad finder and that's very handy too. With the three finders I never have a problem getting my telescope pointed where I want it.There is one downside to using a laser. I live near an NAF (U.S. Naval Air Field) and seriously you'd better be absolutely sure that you don't point that green beam at any aircraft. Not even CLOSE to any aircraft. Those boys can see that beam as well as you can and if they think you're pointing it at them you're going to get a visit from a black SUV carrying people with no sense of humor at all. Lasers can blind a pilot momentarily and while it's been a long time since I was in the military it wouldn't surprise me a bit if it sets off inbound tracking alarms in the cockpit too. So be exceedingly careful about where you point your laser.I use mine for orienting the scope, and finding my next target. I shut it OFF when I'm not actively using it. This saves batteries (those Lithium batteries are expensive) and saves on the beam generator in the laser, extending it's life. Once you use a laser like this you won't want to set up your scope without it.

Plastic - but thick, hard plastic that is actually quite rigid. Holds my green laser quite well, fits in the Orion dovetail base just like the Orion "red dot" Quick Finder. Makes them easily interchangeable. The rings are about 1/4" thick! I don't see ever striping out the clamp screws and it adjusts smoothly. The small separate metal ring is for turning on your laser. It is a thin (super thin) ring with 3 micro miniature set screws around it to secure it to the laser. There is a larger thumb screw to screw down onto the lasers pushbutton and hold it on. This ring was barely large enough to fit over my pushbutton and when I just started the thumbscrew in its threads the laser turned on. I had to back it out to where it was in less than one turn before the laser would go off, not good. -1 star. (To give maximum clearance over the button, the setscrew opposite the thumbscrew was not in at all.) I remedied this by CAREFULLY squeezing the ring with a pair of pliers to make it oval shaped then gently secured it with the 2 set screws either side of the thumbscrew hole. This gave enough clearance over the button to screw in the thumbscrew 3-4 turns before contacting the button. This distortion also made the thumbscrew fit tighter in the threads - less chance of unscrewing and getting lost. Now it works extremely well and I am a happy camper.A word about lasers and batteries: Orion got some bad reviews about their laser running down the batteries when it's cold outside. Not their problem, batteries aren't running down, alkaline batteries stop flowing current when they get cold. Laser goes dead but if you take it inside and warm it up it will work fine. It's the nature of alkaline batteries not the laser. Get lithium batteries and you will not have that problem.

This is by far the best solution for a finderscope. I just bought a Celestron CGEM 800 ($2,200 telescope) and when it came I tossed the finderscope to the side and installed my green laser pen instead. Once you try it you will never want to look through an optical finderscope again. In the future when you buy a telescope they will send you the green laser instead of that stupid finderscope. Note to telescope manufacturers: Lose the finderscope - send us green lasers.Celestron makes a green laser "finderscope" that looks like a better solution. I didn't like the idea of having to adjust SIX screws. After reading the reviews it appears that the Celestron laser is way too wimpy (not bright enough) so I bought this item because I knew that the laser I had was bright enough. When it came I was very happy to find out that I didn't have to adjust 6 screws, only 2. The 3 on one end just hold it in place. On the other end there are 2 that you turn to aim the laser and those two are at right angles to each other. The third one is a pin on a spring that you don't adjust.To adjust a finderscope you have to somehow get your telescope pointed at a star or planet without the finderscope (the first time). Then you adjust your finderscope so the cross hairs are on the star. This is a royal pain because you have to adjust 6 screws (or 3 in a screwy arrangement such that you have to turn two at a time and the finderscope moves 3 different directions (120 degrees apart) depending on which combination of 2 screws you choose to turn).To adjust the green laser all you do is point the telescope at black sky. Then turn the laser until you see the green in the eyepiece. Then adjust it so the green stops in the center of the eyepiece.You will need a dovetail bracket to attach this item to your telescope. There are two such brackets so be careful to get the right one. One bracket is specifically for SCTs (Schmidt-Cassegrain Telescopes).I bought another one for my 2nd telescope. I bought a green laser from wicked lasers but it is terrible. The laser was coming out at such a crooked angle that I could barely get the bracket to point the laser pen way off to the side such that the light would point straight. Worse than that the wicked laser does not like being left on. After being left on for about a minute it will go dim, just like when your battery goes bad. Putting in fresh batteries does not help. You have to wait a very long time for it to cool off, then it will work for another minute or so. I am hoping that I just got a bad one so if anyone has had success with the 5 mw green laser from wicked lasers please let me know.Update 6-8-2013: I am not as excited about using a green laser pen (GLP) as a finderscope as I first was. When it is cold the GLP goes dim. When the sky is dry the green light is hard to see. These two things make the GLP unreliable. Ideally you would have the GLP and some other finderscope as a backup.