Quote:
Originally Posted by toyos
For those who are interested in D & G refractors, here is their website:
http://www.dgoptical.com/index.htm
Are you sure the custom 15" costs USD$200k? Because the 12" objective only costs USD$8.5k and the 8" tube assembly is only $3700. |
As you would be aware the cost of a refractor increases logarithmically as the aperture increases. That cost also includes the pier, the mount and the mount foundations. Be rest assured you don't mount a 15 foot long refractor on an aluminium legged tripod and an EQ6 head.
To give you some idea how the cost increases logarithmically a 6" Takahashi APO costs $18K mounted
http://www.buytelescopes.com/product...=1&pid=9847&m=
an 8" Takahashi APO costs $200K mounted
http://www.buytelescopes.com/product...=1&pid=1727&m=
Cheers,
John B