Category
Exposure & Light
Understanding Reciprocity Failure in Historical Photographic Processes
Why a light meter's straightforward math falls apart on a ten-second exposure, and how photographers working with slow historical emulsions correct for it.
Reading ISO, EV, and Exposure in Historical vs Modern Photography
Modern meters are calibrated for ISO 100 or 400; historical processes run at ISO 1 or lower. Here's what that gap actually means for getting an exposure right.