The photograph unit that consists of three wide-angle single-lens cameras is known as what?

• A. Camera Body
• B. Magazine
• C. Trimetrogon Photographs
• D. Lens Cone Assembly

Answer: (C)

In aerial mapping, capturing terrain accurately often needs multiple viewpoints in one pass. The three-camera setup called trimetrogon photographs uses three wide‑angle cameras mounted together: one aiming straight down and two angled to the sides. This gives three overlapping images—vertical imagery for precise planimetric mapping and oblique views that reveal relief and features toward the edges of the area. Having all three photos in one exposure run makes it easier to create accurate maps and 3D interpretations without extra flights. That’s why the term trimetrogon photographs is the best fit for describing this photograph unit.