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The two OTA's would look remarkably similar to each other if I converted the 12" steel tube to fit the 10" f/8 mirror and flat.
Both would have much the same length and finish. The refractor has an 8" diameter tube. While the reflector would have a 12" diameter tube. Both would be around 2m or 6'6" long.
The complete refractor now weighs 45lbs. The empty 12" tube weighs 23.5lbs.
The 10" primary mirror would add about 10lbs. With mirror cell, focuser and secondary adding [say] another 5lbs or thereabouts. The pair would end up not far short of 100lbs once they have been attached to each other and the mounting.
The difference between them is having their objectives at opposite ends. Would the 10lb refractor objective and its cell balance the 10" mirror in its own supporting structure? Where would the balance point lie if both were fixed together?
It is almost certain that the refractor's 7lbs of balance weights would need to move or be removed. The 10" mirror should carry out their balance duties.
Would both OTA's overload the new "Heavy" mounting? The moment of the two long and heavy OTAs is not insignificant.
Unfortunately I don't have any 12" [30cm] tube rings to test the results of stacking them together.
Click on any image for an enlargement.
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