AstroMuni replied to the topic 'New Bahtinov Mask Assistant Tool' in the forum. 2 years ago

Hi Patrick,
I have a question about the HFR when a Bahtinov mask is in place. Is that accurate or does the mask 'spoil' the view and HFR readings become less meaningful? i.e all that matters is how close is the centre line to the actual centre.

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