Edward ran into a problem while shooting still life photos with his view camera, Kim says. The closer you get to a subject with your view camera, the narrower your depth of field is. To capture the relatively small pepper completely in focus from up close, Edward needed an extremely small aperture.
So, Edward made his own stops for his lens, eventually settling on a f/240 aperture — essentially turning the view camera into a pinhole camera. With such a smaller aperture, exposing Pepper No. 30 adequately with natural light required an ultra-long exposure time of about 4-6 hours.