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on February 8, 2014
Very easy to install, only needs the included hex key. Instructions are clear on where to mount it. Make sure you remove the corresponding (RA) knob on the telescope, or you will break the flexible aluminum motor mount coupler.

Put it on my Celestron PS 127EQ and it tracks Jupiter nicely (with an 8mm eyepiece, i.e. with good magnification). Telescope mount needs to be aligned with the North Star (Polaris) first.

Speed is adjusted with a small knob on the motor unit. For testing I found it tracks Jupiter for more than an hour with barely any adjustments.

Note that the only way to adjust right ascension once the motor is connected is to loosen the r.a. lock nut and then turn the scope manually.

EDIT: I have used it some more, and found it works rather nicely. As I said, you will need to align your telescope mount with the North Star first (polar alignment), at my latitude it is located at a fixed 34 degrees above the horizon. There is a small plastic knob to adjust the speed, and the reason for it is that you need to adjust the speed ONCE only. You are basically setting the angular speed by which it tracks an object in the sky, and that rate (for a given location) is the same for all stars and planets in the sky. It is best to adjust the speed at some higher magnification (say 8mm eyepiece), with a bright object such as Jupiter. This requires a bit of trial and error, watching say one of Jupiter's moons staying at the same distance from the edge of your viewing disk. The next day when you take the telescope out again, you will NOT need to adjust the speed any more.

EDIT 2: Three months have gone by and I still have to change the original battery ... my estimate so far is that one 9V battery will last something like 30+ hrs or use. See the pictures I posted on the right to see how well it works!

EDIT 3: I found that when the battery starts to run low, the speed will inevitably decrease a bit. That means it's time to swap out the battery, so always keep one handy. Of course in my case it happened right when I was trying to take some long exposures of the Andromeda galaxy ...

EDIT 4: Mine has been running for a year now without any issues whatsoever. During that time I went through about 3 9V battery sets, with about a long observation night every one to two weeks. Once in a while there is a star or planet location where that little plastic box is a bit in the way.
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While this piece of Hardware is useful and inexpensive, I have found that it doesn't hold up very well in the cold. Anything below 60 degrees Fahrenheit and the motor slows down and eventually stops period I have since replaced it with a more dependable motor.

That being said, for under $50, it's not a bad option especially if you live in a warm climate.
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on September 4, 2017
Im giving this 5 stars for now, might change later.

Boy, where to start with this.. I tried multiple viewings without a motor. It is much easier. What you find out, is if you use a high power eyepiece on planets or whatever, for a fact, itll fly off your FOV (field of view) rather quickly. I barlowed a 4mm eyepiece x3, and 10 seconds is all you have with Saturn.

This is where this comes into play.
These motors are true god-sends. Properly adjust its speed, polar-alignt your telescope (search on youtube, great tutorials there) and you can track planets or other celestial object for 20 minutes+ quite easily. Trust me, it is REALLY bad without a motor. You cannot change eyepieces, you cannot call your friends to watch, you cannot photograph anything.

I have 2 beefs with it tho:
1. When viewing south and polar aligning, you basically turn your scope upside-down (facing 180 degrees south while main alignment is north). During this position, counterweight might get stuck on the motor.
2. Its rather expensive and this can be imitated by an arduino with some dumb code. That being said, its not SO easy, and imo not worth the effort.

Get a motor, take the time to learn to align your scope properly and you will wonder why in the world you didnt do it sooner.
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on June 30, 2017
Not only does this inexpensive little guiding motor simply work...it has a (very tiny) button to adjust the drive rate. There are two brackets for different types of Celestron mounts...CG-2 and CG-3. But wait! There's MORE! One of the brackets fit my Orion Min-EQ (EQ-1) mount perfectly. I recognized this from the picture at Amazon and from searching the web.

You won't get high-accuracy tracking for long-exposure photos or long-term viewing (But, what do I know?! Maybe you WILL!). But this motor will allow tracking a wider fields of view through a telescope and wide-field photography, as long as you can set your equatorial mount up to align with the celestial poles.

The motor is noisy.... But who cares?!
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on March 19, 2014
This motor drive drives my Celestron Powerseeker 127 MM well. the reason I gave a 4 instead of a five is that the motor drive gets in the way of the telescope in certain positions, and also I cannot use the slow motion control of the RA axis when the drive is attached.
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on February 9, 2017
I bought this to add to a camera slider (IMORDEN 48"/120cm Middle Video Camera Slider Rail Dolly Track Camera Camcorder Slider) after working out how to mount/propel the carriage I am very happy with this motor. The slowest speed takes about 12 or more hours from end to end the fastest is around the three/four hour mark. Weight and degree of incline does effect some but not very much. I have loaded the carriage with a Nikon 300s with 24-85 macro lens, a Canon XF100, an SJ4000 (wi fi version) and a Brinno TL200 Pro. - not all at the same time- and the motor chugged away quite happily. My only wish is to be able to speed it up so it can be more useful for real time video - but for long time lapse pieces, excellent.
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on May 24, 2016
The motor drive works as advertised for the standard AstroMaster EQ mount. It's not all that noisy but it does get in the way sometimes when pointing at some objects lower on the horizon. That's pretty easy to work around though, just point at something else for a bit until the object is in a different position. It does take a little fine tuning once you get the mount polar aligned as far as the speed goes, but after that objects stay pretty steady in the scope. It takes one 9V battery so keep one handy just in-case but it seems to last for quite a while.
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on May 14, 2017
It was worn on an equatorial mount with 910mm F15 Achromat telescope about 40 years ago with a little processing. Driving sound reminiscent of motor driven plastic model made when I was a child is fun and can not be helped. I never thought that classic machines full of analog feeling were so fun. It can be funny even that stars are shifting. It tends to ask for the latest machine, but it may be enough with the eye view sight. I love this machine.
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on July 12, 2017
It works, but keep in mind that it will be only for visual or short exposures maybe 30 second max
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on May 30, 2017
I like it. tracks well really helps for those long exposure shot
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