Bahtinov masks are easy to #3dprint, and are a very precise focus tool when preparing an #astrophotography session. Grid holes in the mask cause diffraction spikes to appear when looking at the point light from stars. Achieving optimal focus consists in centering the middle spike between the side spikes, so that the figure is symmetric.
I’m prototyping telescope piers with #3dprinting. Usual discussion over rat cage and fixed plate… Then, wood, metal or concrete implementation.
Cute little enclosure for temperature and humidity sensor DHT22. #astronomy #3Dprinting