Markaus
The collapsible or truss style scopes are great, but as with many choices in this market, you are sacrificing aperture. At the 8-10" end the space saving is IMHO fairly minimal and anless it is essential that you need the space saving, a solid tube will get more aperture for your dollars, or save dollars that can be spent on better accessorise (eyepieces, telrad, atlases etc)
While it is true that a solid tube can be later used for imaging, I always think it is best to get the best possible gear for what you are doing now, and for visual use, aperture is what really matters.
Malcolm
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