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I bought the 'hubble 5 star' as well; it's construction is cheap and nasty but it works well. I collimated a C8 inside the house (at 280x) over a 20m distance, which is closer than recommended I think, but the image looked fine for collimation purposes. I think any distance would be okay so long as you can achieve focus. I checked my C6 and it still looks spot-on, even though it was purchased from the US; I have a set of Bob's Knobs for it but won't install them until the collimation goes out.
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