On Mon, Mar 7, 2016 at 2:47 PM, Larry Colen <[email protected]> wrote:
> Is it five "steps" or five "stops"? With a step being 1dB or 1/3 stop, > there is a big difference between 15db, and 5dB, like a factor of 10. I've > been seeing it reported as five stops A step is a factor of two in exposure--the same thing most people mean when they say "stops". Some writers maintain a distinction between "steps" and "stops": "stop" refers to the aperture stop--the physical obstruction in the lens, while "step" is used as a unit of exposure change (which depends on both the aperture and shutter speed). See, for example, Footnote 7: https://en.wikipedia.org/wiki/Zone_System -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
