Quote:
Originally Posted by Chippy
I'm not sure about this, but from what I have read I don't think these RC mirrors are purely CNC machined. I think they require manual finishing to get the complex curves required. In which case labour cost is a major factor.
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G'day Chippy. I knocked this off from Trevors post below.
Computer designed and fabricated optics: To keep the cost of each Astro-Tech RC so reasonable when compared to competitive RC scopes, the computer-optimized Astro-Tech hyperboloid mirrors are automatically ground and finished to very high tolerances using custom-made computerized mirror grinding machines. This precision computer control guarantees an exact repeatability of figure from mirror to mirror that is difficult to achieve using more costly conventional hand figuring. After grinding and polishing, each mirror is individually tested using a Zygo interferometer to assure that it meets or exceeds its specified surface accuracy.
Mark