Quote:
Originally Posted by glend
and the optical quality is yet to be determined. You only have to look at local GSO 12" f5 newt pricing to see they are putting a significant premium on these new lightweights. Time will tell.
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If the optics are like it's little brother (153mm f4 carbon newt) then the optics are basically diffraction limited just a small amount better, 0.88 Strehl Ratio. The carbon fibre tube for the zwo 12" f5 would be around 700-800 dollars and then optics etc... on top of that. The price of around 1500 AUD is not that bad.
SkyWatcher advertise their optics to be diffraction limited (0.82 Strehl)
While GSO optics sound good with big numbers when you get down to the nitty gritty it's diffraction limited also 0.82 Strehl ratio.