Alstar AccuFocus Electronic Telescope Focuser

After installing the box didn't work in one direction. The working direction failed after 5 seconds of use with a burning smell. I've since checked the motor and it works the focuser perfectly in both directions with 9v applied to the motor. I don't see any way to contact the seller to get a replacement box. The only option is to refund which seems silly when I only need a replacement box. Otherwise the quality is good and fits perfectly.

I had assumed that this was a generic device that should work with most telescopes. The first one I received would only adjust in one direction. A replacement was sent almost immediately by Amazon. It required modifications to the mounting bracket in order to fit my rack and pinion adjustment on my Orion telescope. I had the tools to do the mods but not everyone will. The bracket I used was not made for a flat surface so I flattened it using a bench vise. I then had to cut off about half of the bracket (see the photo) and enlarge the two holes slightly for the mounting screws. The coupler between the motor and the rack and pinion was too large for the adjustor shaft. I enlarged the shaft for the adjuster using shrink sleeves used for electrical connections. So far it works very well. Price wise it was very reasonable.

The first one I ordered was damaged in transit or something according to Amazon so I had to order again. Still haven't received the refund for that one. I had to order another and it showed up quickly. However, it's cheap. The motor is weak. The brackets included were worthless and I ended up having to fabricate one of my own. Even with this I'm not sure this thing will last me. I also had to solder one of the battery leads to the circuit board inside the hand controller because it came loose the second I put a 9v battery in there. The battery compartment door also doesn't stay in place. Cheap. Definitely not worth the 75 bucks I spent on it. I will test the whole setup tonight or tmw after the weather clears. That will be the real test and I imagine that as much draw as that motor puts on that battery, that I will have to put a new battery in every night. We shall see. I may end up returning this. Don't waste your money or your time on it.

Once I got the knob off I was able to puzzle together the install process.(remove knob bar from scope, then twist left side to unscrew with a bit of force.) The Instruction sheet included was so dark most images were unusable.I installed this on a celestron Explorer Dx 130.Very simple install using one small bracket.Amazing difference in fine control when focusing with it.at this point I can say this is a great upgrade and will update if things change

I installed it on a Meade Polaris 80/900 refractor and it works great with one of the provided adapters. It is of very good quality and the delivery was very fast. I definitely recommend it.