All Dunn

Nikon D2Xs + 28mm Nikkor f/3.5 AI lens.

Interviewed for ‘Camera & Darkroom’ magazine during the 1980s, Sally Mann (https://en.wikipedia.org/wiki/Sally_Mann) said she had supported her artwork by doing lots of small freelance jobs. For this work she often used a 40mm Zuiko lens on a 35mm camera. She felt that 40mm was "about right."

The field of view provided by a 28mm lens on a crop sensor camera is very close to 40mm. Therefore it might suit photographers who felt that, for their purposes, 50mm was a bit too long and 35mm was a bit too wide.