How to cite/credit a photograph using Turabian?
Would the Turabian Tip Sheet on Figures &amp; Captions be of help?
The pattern is:
Figure {Number}. {Description of the picture}. Photograph by {Name}, {Date}. {Source}. {ID}.
The example provided by the tip sheet is:

Figure 3.1. Helpers in a Georgia Cotton Mill. Photograph by Lewis W. Hine, January 19, 1909. The National Child Labor Committee Collection, Library of Congress Prints and Photographs Division, Washington, DC. LC-DIG-nclc-01581.

No footnote and no bibliographic entry is needed.