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The GSO/Bintel equivalent focuser 10:1 or not is definately not for imaging... in no way has it ever worked in my neck of the woods.
Recently i have done a bit of work to the SW Crayford style focuser and let me tell you that it can pull ~4kgs vertical weight and hold it. All up my work to it has equated to 0 dollars spent though im in the process of sourcing correct motors to finish the job and make it a fully electronic focusing unit (one that i would love to hook up to DSLR focuser though usb...) and ultimately making a very viable quality unit! other wise do not spend <300 on a focuser, it will not be worth the money in the long run.
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