Observation tool for sunspots: Camera obscura in action Image Equipment History Observing Sunspots with Camera
Observation tool capturing sunspots - Camera obscura Image Equipment History Sunspot Observation Device
This photo was taken in The Czech Republic (Moravian region) in a protected forest area. violet flower purple flower purple Pulmonaria obscura in April
None Engraving Diagram Camera Obscura - Photographic Equipment Refracting telescope acting as camera obscura for observing sunspots
None 19th Century Style Camera Obscura - Photographic Equipment Cross Section Depiction of a camera obscura