For this summer, I would like to use the Meade LX200s at the University Physics Building - eventually expanding to some imaging. I have a Meade DSI but am unsure how back focus works on a Meade LX2000 in terms of aligning an object to a chip using a flip mirror. My usual scopes are a 10" GEM mounted newt and a 5 1/4" refractor. For those scopes I have backfocus and target centering problems reasonably worked out - I have a flip mirror, a parfocal eyepiece set up, and for the newt, a low-profile focuser. This makes getting the image on the small DSI chip a _relatively_ easy task. A separate off-axis 70mm refractor is used for alignment and guiding. Looking at the Meade LX200 - and one equipped with an autofocus controller - it is unclear to me how there is enough back focus room on these SCTs. How much backfocus room is there? Is there enough room to accomodate a flip mirror, a parfocal ep and a camera. Most pictures that I see of LX200s and most people I have seen using them at SPOC, seem to just stick the camera directly into the visual back with no flip-mirror or parfocal e.p. That setup seems like it would make targeting the feature onto a small DSI chip quite difficult - that is aligning the feature by using the camera view. - Clear Skies - Kurt _______________________________________________ Sent via CSolutions - http://www.csolutions.net