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Kal (Andrew),
Had a look at the article from your link for the Honders-Riccardi Telescope. Lots of technical stuff but highlighted a few parts :
...no aberrations to speak of with a 300mm f/7.4 Honders-Riccardi variant.
What makes Honders telescope really stand out is its unsurpassed correction level.
This Honders-Riccardi system is also fairly tolerant to miscollimation.
Sounds great. If mass-produced, hopefully its price will be less than a kazillion dollars.
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