Quantum 6 on San Francisco craigslist
Posted 29 October 2006 - 11:30 PM
There seems to be quite a few 4-inch Quantum Maksutov-Cassegrains around, but to see a 6-inch is unusual. These telescopes by Optical Techniques were made for only a short period of time in the late 1970s and early '80s. Does anyone know the precise production numbers for each model?
Posted 30 October 2006 - 12:22 AM
The Q 6's are obviously quite rare. But, interestingly enough, I know someone who recently placed a wanted ad on A-Mart for a Q6. He got several replies. I would bet this one in SF was one of the replies.
I have a VERY extensive restoration log that I may post here when I am done with my Q6. The Q6 is a fantastic scope. Equal to the Questar 7 in optical quality. Same mirror manufacturer, Cumberland Optics. And, you get a nice drive base too with the Q6.
But, some of the best Q 6's have silvered mirros and diagonal mirrors that may have deteriorated over time. This mean possible stripping and recoating, this means R&R of the primary. The focuser repair on this one is going to be the drive belt. That requires removal of the tube from the control box, popping the retainer clip for the focuser shaft, unscrewing the control box from the primary mirror housing, removal of several set screw sleeves to expose the belt, replace the belt and align the teeth, replace everything you did to get here, and then hope collimation is good.
If you are considering this scope, feel free to send me a PM for some insight into what to look for and parts that are available (or not).
If this scope is nice, you are going to be amazed how good a 6" MC can be!
Posted 30 October 2006 - 12:44 AM
Chris Lord has his Q6 up for sale (on Amart) but it hasn't sold yet.
Posted 30 October 2006 - 12:58 AM
I am just finishing up my "Quantum Blue" one of a kind wedge and tripod and then I should be ready for some pictures.
Posted 30 October 2006 - 10:48 AM
Three or four Q8 Mak-Cass's.
One Q6 f4 Mak-Newt RFT.
About 50 Q100's (Q4s with no diagonal, just straight through focusing), about 15 sold without mounts.
About 15 Q150s, none sold with mounts.