Except that increasing by one f-stop (somewhat confusingly, termed "stopping down") reduces the aperture by the square root of two (1.414159...) and therefore reduces the amount of light entering the camera by a factor of two. (The f/number value is the ratio of the focal length to the aperture of the lens.) I assume he meant "went down one f-stop" (that is, stopped up).Good eye. JMS explained at the time:
Yes, we brightened things up a notch, but only a notch, because we
discovered that a lot of the good work being done on the sets and the
costumes wasn't being seen because we were too dark. So we went up about
one f-stop, but at the same time began using more shadows, textures and
colors, so the show has a denser look to it.
https://en.wikipedia.org/wiki/F-number
Stopping up would also have the effect of decreasing the depth of field so the bokeh might be more noticeable.
https://en.wikipedia.org/wiki/Bokeh
Last edited: