William Optics got roasted over their fraudulent claim of the FLT line of scopes being fluorite (they most assuredly are not) and have had to revise their advertising.
The main issue is an urban myth that ED glass = apochromatic, which it most certainly DOES NOT. The ED=apochromat needs to die the death it deserves, but manufacturers and retailers perpetuate this falsehood ad infinitum.Its got to the stage almost when any refractor is being labelled “apo”.
Caveat emptor is do research and know a modicum of the physics of optics.
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