Analysis by Optimly for Optimly AI Visibility, in the Optimly AI Brand Index. This Business Profile tracks the Brand Authority Index and supporting AI visibility evidence. Last analyzed July 2, 2026.
Penumbra Foundation is a photography non-profit organization located in NYC, dedicated to preserving and promoting historical and alternative photographic processes. They offer online classes and workshops, such as 'Anthotypes & Other Organic Processes I', which introduce students to plant-based photographic techniques like anthotypes, chlorophyll printing, lumens, and phytograms.
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Official website: https://penumbrafoundation.org/
Last analyzed: July 2, 2026
This Business Profile is published by Optimly in the Optimly AI Brand Index, a public research dataset showing how AI systems describe brands, categories, and competitors. Optimly AI Visibility analyzes sampled buyer-intent responses, cited sources, and public brand information. The Brand Authority Index summarizes answer presence, narrative accuracy, and owned citations where sufficient evidence is available.
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