All images are 8x10 inch direct positive tintypes in Yosemite National Park. All images are made with wet plate collodion in full accordance with the 19th-century practice, with the exception of modern black aluminum backing. The camera used was the mid-1870s American Optical Co., division of Scovill Manufacturing Company shot with Dallmeyer Triple Achromat 8in, 14in James Queen single achromat, and 21in Voigtlander Euryscope.