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Design or optical quality???
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28-01-2021, 07:51 PM
astro744
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Join Date: Apr 2007
Posts: 1,244
Some info from Tele Vue on APO design.
https://televue.com/televueopticstal.../#.YBJ4t8rZWhA
I think build quality and testing and buying from a reputable manufacturer should be considered in the decision process.
astro744
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