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One question about the Bahtinov mask; is it alignment sensitive?

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It does not appear to be. I tested moving the mask's center point around and it did not appear to affect the image significantly. Of course, rotating the mask will rotate the pattern. If it is too far to one side or the other, it may affect the brightness of the affected diffraction spikes, but the center location appears to not change.

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John Wunderlin
Vendor - Spike-a Bahtinov Focusing Mask
Empire Ranch Observatory
Iowa County Astronomers

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