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Old 01-11-2013, 01:11 PM
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Shiraz (Ray)
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Join Date: Apr 2010
Location: ardrossan south australia
Posts: 4,822
it could be true but meaningless. The spot size (with diffraction) only has to be less than about half the atmospheric blur disk to get close to the maximum possible resolution - after that it becomes immaterial how much better it is. In Australian conditions, better than about 1 arc sec is probably good enough in most locations, so anything from a reasonably well made 150mm scope on upwards will be as good as it gets.

Looks like this is a hyperbolic system with a Ross or Rosin 2 element corrector. It will be pretty good, but the extravagant claims really are hyperbole.
http://www.telescope-optics.net/sub_..._corrector.htm is worth a read for the general idea.

Last edited by Shiraz; 01-11-2013 at 01:25 PM.
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