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That German guy Mr Rohr, he does analysis of scopes. I wonder if he had done this one as its new.
But FPL53 triplet and air spaced - wow, that's high spec.
If F6.9 is not fast enough you can get a reducer. Most are .75X so that would make it F5.175 that's almost the same as an FSQ106 F5.
I can't see you having a problem. ED80's have shown many sharp halo free images and that's only an FPL53 doublet.
As I say worst case is switching to a camera using the KAF8300 sensor.
I doubt it will be needed. The TEC140 just got caught out by advancing cameras. Yuri does not do imaging and optimises his scopes for visual, that's why. AstroPhysics and Tak have always considered the imager first.
Greg.
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