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U.S. Air Force First Sergeant Academy Instructor Master Sgt. Robert M. Stephens leads a classroom discussion, Mar. 19, 2019. Stephens is a first sergeant with the Arkansas Air National Guard's 188th Wing, and the first adjunct instructor to teach the academy's new curriculum. (U.S. Air Force photo by William Birchfield)
CAMERA
NIKON D810
LENS
24.0-120.0 mm f/4.0
APERTURE
71/10
SHUTTERSPEED
1/80
ISO
900
No camera details available.
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