Bahtinov mask for Nikon 200-500mm f5.6

prusaprinters

<p>A Bahtinov mask add-on for my Nikon 200-500mm f5.6 diffraction spike generator meant to assist with achieving perfect focus in astrophotos. It uses the same mounting ring to attach to the front of the lens hood.&nbsp;</p><p>Print in black filament to reduce reflections that can degrade the contrast of astrophotos. Sand the inside of the mount until it fits smoothly but snugly with the mounting ring.</p>