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I have one and the quad corrector.
It's been relegated to being my solar telescope....a very undeserving role....as it is a sublime piece of glass.
Every AP scope I have owned has run out of light
when pushed to extreme magnifications, as opposed to lesser instruments which invariably show aberrations in one form or another.
Telescopes are not just optical beasts either.
Unless the mechanicals keep things where they need to be, the image can be very average. AP have few rivals there.
I they are indeed magical IMHO.
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