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Bahtinov mask question?
Hi fellow astrophotographers. I have a question about using a Bahtinov mask with an 80mm refractor and DSLR?
I notice that the mask works fine on bright objects such as Venus, the spikes are clearly visible in the view finder. Antares is a different matter, it's not as bright and the diffraction spikes are impossible to see. So focus is a matter of the sharpest blur if that makes sense.
Would it be better to have a mask with finer, that is narrower elements - currently about 6mm - would that improve definition of the spikes?
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