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If your scope will focus on close objects but not further away it must be because your objective lens is too far away from the primary mirror. Ie, it needs to be brought closer somehow. Usually the focussed does this for you, but if there is not enough 'in'travel, then there's something else wrong. Make sure there are no unnecessary extension tubes attached in your focusing train. As a last resort you can look at shortening the path by raising the primary mirror up the ota tube, but since this is a store-bought scope, you should not have to do that.
Hope this helps. Brian
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