Ronchi Screen - ATM, Optics and DIY Forum - Cloudy Nights

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Ronchi Screen - ATM, Optics and DIY Forum - Cloudy Nights

What's this grating? Could I use it for a Ronchi screen? - ATM, Optics and DIY Forum - Cloudy Nights

Foucault/Ronchi illumination - ATM, Optics and DIY Forum - Cloudy