Hartmann mask (customizable) - planetary astrophotography focusing

Hartmann mask (customizable) - planetary astrophotography focusing

Description

Hartman mask is useful when focusing on planets or Moon. As sample there is a STL file for Newton 150 mm (163 mm mask diameter, outer holder) attached. Mask can be customised in Customizer, there are several settings that can be adjusted: - diameter - wall thickness - holder height - use of circles or triangles - outer or inner holder

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