American photographer Sally Mann’s work often inhabits a thin line between beautiful and disturbing, a trend that continues in her latest work, Upon Reflection. The series of self-portraits get their phantasmagorical quality from a 19th century wet-plate collodion process, requiring a photographic emulsion to be smeared on a glass plate a few minutes before it’s exposed. American Photo Magazine draws an interesting comparison to people who use filters on their Instagram photos, saying they’re "in a roundabout way, the same: they’re both making a choice that defines the mood and style of their photos—a choice that’s grounded in the historical, physical qualities of photography."