GSO 10" DOB Focus

[AlexN]

Sure would be funny if the newt up and grew legs then walked out the door... hahaha.. A CF tube would not only drop the weight by over half, but it would look mighty swanky too.. I would make a suggestion though.. Make the new tube 10" longer than it has to be.. That way you've got yourself a free dew sheild built into the scope... It'll add contrast, slow/stop the formation of dew on the primary and secondary and even with that extra tube length, you'll still be down at least 10kgs on the original aluminium tube..

[Tandum (Robin)]

I was looking at these. They come in 48" (1220mm) lenghts and the current tube is 1205mm. They say tube weight is 3.28Kgs so I was thinking of stripping this dob to weigh all the bits.

The curved secondary mounts might be worth a look also.

[AlexN]

Bah, curved secondaries are good for visual work if you really despise diffraction spikes... for imaging, you'll still get spikes, just they will be weird curvy spikes... I reckon the weight of your 10" tube would have to come in at something like 9~12kgs..