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I have what I assume is the same model from Bintel and find it very easy to use, especially as you can collimate the primary of a big newt from the bottom end of the scope. I also use it to collimate the secondary (once the longitudinal position of the secondary is right). It doesn't seem to need collimating itself as the laser seems fixed in the unit that I have. I have tested it by looking for any wander of the laser as I rotate the collimator.
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