http://www.andrewscom.com.au/site-section-10.htm This link here shows Focal Extenders.They fit into the focuser tube and extend the Back focus .Try this Put your eyepiece back in wind the focus back then loosen the Eyepiece clamp and slowly move the eyepiece back toward's you and see if things come into focus.then you will know you will need an Extender. Tony .P.s be careful of screwing the bottom half of the Hyperion off. Small bits of paint etc. can break off and contaminate the eyepiece lens.